PlzNavigate: implement RequestNavigation in the no live renderer case

content/browser/frame_host/render_frame_host_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/render_frame_host_manager.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/render_view_devtools_agent_host.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
 #include "content/browser/frame_host/debug_urls.h"
 #include "content/browser/frame_host/interstitial_page_impl.h"
+#include "content/browser/frame_host/navigation_before_commit_info.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/frame_host/navigation_request.h"
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_factory.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/frame_host/render_frame_proxy_host.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
 #include "content/browser/webui/web_ui_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/referrer.h"
 #include "content/public/common/url_constants.h"
+#include "net/base/load_flags.h"
 
 namespace content {
 
+namespace {
+
+// PlzNavigate
+// Simulates a renderer response to a navigation request when there is no live
+// renderer.
+FrameHostMsg_BeginNavigation_Params BeginNavigationFromNavigate(
+    const FrameMsg_Navigate_Params& navigate_params) {
+  FrameHostMsg_BeginNavigation_Params begin_navigation_params;
+  begin_navigation_params.method = navigate_params.is_post ?
+      "POST" : "GET";

[nasko, 2014/08/13 00:08:00]

nit: these should fit in the previous line

[clamy, 2014/08/13 13:27:24]

Done.

+  begin_navigation_params.url = navigate_params.url;
+  begin_navigation_params.referrer =
+      Referrer(navigate_params.referrer.url, navigate_params.referrer.policy);
+
+  // TODO(clamy): This should be modified to take into account caching policy
+  // requirements (eg for POST reloads).
+  begin_navigation_params.load_flags =
+      net::LOAD_NORMAL | net::LOAD_ENABLE_LOAD_TIMING;
+
+  // TODO(clamy): Post data from the browser should be put in the request body.
+
+  begin_navigation_params.has_user_gesture = false;
+  begin_navigation_params.transition_type = navigate_params.transition;
+  begin_navigation_params.should_replace_current_entry =
+      navigate_params.should_replace_current_entry;
+  begin_navigation_params.allow_download =
+      navigate_params.allow_download;
+  return begin_navigation_params;
+}
+
+}  // namespace
+
 RenderFrameHostManager::PendingNavigationParams::PendingNavigationParams(
     const GlobalRequestID& global_request_id,
     scoped_ptr<CrossSiteTransferringRequest> cross_site_transferring_request,
     const std::vector<GURL>& transfer_url_chain,
     Referrer referrer,
     PageTransition page_transition,
     int render_frame_id,
     bool should_replace_current_entry)
     : global_request_id(global_request_id),
       cross_site_transferring_request(cross_site_transferring_request.Pass()),
@@ skipping 168 matching lines @@
   // the request.
   if (pending_nav_params_ &&
       pending_nav_params_->global_request_id ==
           entry.transferred_global_request_id()) {
     pending_nav_params_->cross_site_transferring_request->ReleaseRequest();
   }
 
   return dest_render_frame_host;
 }
 
+// PlzNavigate
+bool RenderFrameHostManager::RequestNavigation(
+    const NavigationEntryImpl& entry,
+    const FrameMsg_Navigate_Params& navigate_params) {
+  CHECK(CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableBrowserSideNavigation));
+  // TODO(clamy): replace RenderViewHost::IsRenderViewLive by
+  // RenderFrameHost::IsLive.
+  if (render_frame_host_->render_view_host()->IsRenderViewLive())
+    // TODO(clamy): send a RequestNavigation IPC.
+    return true;
+
+  // The navigation request is sent directly to the IO thread.
+  OnBeginNavigation(BeginNavigationFromNavigate(navigate_params),
+                    entry);
+  return true;
+}
+
 void RenderFrameHostManager::Stop() {
   render_frame_host_->render_view_host()->Stop();
 
   // If we are cross-navigating, we should stop the pending renderers.  This
   // will lead to a DidFailProvisionalLoad, which will properly destroy them.
   if (cross_navigation_pending_) {
     pending_render_frame_host_->render_view_host()->Send(new ViewMsg_Stop(
         pending_render_frame_host_->render_view_host()->GetRoutingID()));
   }
 }
@@ skipping 317 matching lines @@
   RFHPendingDeleteMap::iterator iter =
       pending_delete_hosts_.find(site_instance_id);
   if (iter != pending_delete_hosts_.end() && iter->second.get() == rfh)
     pending_delete_hosts_.erase(site_instance_id);
 }
 
 void RenderFrameHostManager::ResetProxyHosts() {
   STLDeleteValues(&proxy_hosts_);
 }
 
+// PlzNavigate
 void RenderFrameHostManager::OnBeginNavigation(
-    const FrameHostMsg_BeginNavigation_Params& params) {
+    const FrameHostMsg_BeginNavigation_Params& params,
+    const NavigationEntryImpl& entry) {
+  CHECK(CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableBrowserSideNavigation));
   // TODO(clamy): Check if navigations are blocked and if so, return
   // immediately.
   NavigationRequestInfo info(params);
 
   info.first_party_for_cookies = frame_tree_node_->IsMainFrame() ?
       params.url : frame_tree_node_->frame_tree()->root()->current_url();
   info.is_main_frame = frame_tree_node_->IsMainFrame();
   info.parent_is_main_frame = !frame_tree_node_->parent() ?
       false : frame_tree_node_->parent()->IsMainFrame();
   info.is_showing = GetRenderWidgetHostView()->IsShowing();
 
-  navigation_request_.reset(
-      new NavigationRequest(info, frame_tree_node_->frame_tree_node_id()));
+  // TODO(clamy): Check if the current RFH should be initialized (in case it has
+  // crashed) not to display a sad tab while navigating.
+  // TODO(clamy): Spawn a speculative renderer process if we do not have one to
+  // use for the navigation.
+  navigation_request_.reset(new NavigationRequest(
+      info, entry, frame_tree_node_->frame_tree_node_id()));
   navigation_request_->BeginNavigation(params.request_body);
-  // TODO(clamy): If we have no live RenderFrameHost to handle the request (eg
-  // cross-site navigation) spawn one speculatively here and keep track of it.
+}
+
+// PlzNavigate
+void RenderFrameHostManager::CommitNavigation(
+    const NavigationBeforeCommitInfo& info) {
+  CHECK(CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableBrowserSideNavigation));
+  // Update the stored NavigationEntry for commit.
+  // TODO(clamy): Check if some more state should be updated at that point.
+  navigation_request_->UpdateEntryForCommit(info.navigation_url);
+
+  // Pick the right RenderFrameHost to commit the navigation.
+  SiteInstance* current_instance = render_frame_host_->GetSiteInstance();
+  SiteInstance* new_instance = GetSiteInstanceForNavigation(
+      navigation_request_->entry());
+  DCHECK(!pending_render_frame_host_.get());
+
+  // TODO(clamy): Update how pending WebUI objects rae handled.

[Charlie Reis, 2014/08/12 19:04:50]

nit: are

[clamy, 2014/08/13 13:27:24]

Done.

+  if (current_instance != new_instance) {
+    CreateRenderFrameHostForNewSiteInstance(
+        current_instance, new_instance, frame_tree_node_->IsMainFrame());
+    DCHECK(pending_render_frame_host_.get());
+    // TODO(clamy): Wait until the navigation has committed before swapping
+    // renderers.
+    scoped_ptr<RenderFrameHostImpl> old_render_frame_host =
+        SetRenderFrameHost(pending_render_frame_host_.Pass());
+    if (frame_tree_node_->IsMainFrame())
+      render_frame_host_->render_view_host()->AttachToFrameTree();
+  }
+
+  frame_tree_node_->navigator()->CommitNavigation(
+      render_frame_host_.get(), info);
+  navigation_request_.reset();
 }
 
 void RenderFrameHostManager::Observe(
     int type,
     const NotificationSource& source,
     const NotificationDetails& details) {
   switch (type) {
     case NOTIFICATION_RENDERER_PROCESS_CLOSED:
     case NOTIFICATION_RENDERER_PROCESS_CLOSING:
       RendererProcessClosing(
@@ skipping 126 matching lines @@
     const NavigationEntryImpl* new_entry) const {
   NavigationControllerImpl& controller =
       delegate_->GetControllerForRenderManager();
   return current_entry && web_ui_.get() &&
       (WebUIControllerFactoryRegistry::GetInstance()->GetWebUIType(
           controller.GetBrowserContext(), current_entry->GetURL()) ==
        WebUIControllerFactoryRegistry::GetInstance()->GetWebUIType(
           controller.GetBrowserContext(), new_entry->GetURL()));
 }
 
+SiteInstance* RenderFrameHostManager::GetSiteInstanceForNavigation(
+    const NavigationEntryImpl& entry) {
+  SiteInstance* current_instance = render_frame_host_->GetSiteInstance();
+  SiteInstance* new_instance = current_instance;
+
+  // We do not currently swap processes for navigations in webview tag guests.
+  bool is_guest_scheme = current_instance->GetSiteURL().SchemeIs(kGuestScheme);
+
+  // Determine if we need a new BrowsingInstance for this entry.  If true, this
+  // implies that it will get a new SiteInstance (and likely process), and that
+  // other tabs in the current BrowsingInstance will be unable to script it.
+  // This is used for cases that require a process swap even in the
+  // process-per-tab model, such as WebUI pages.
+  const NavigationEntry* current_entry =
+      delegate_->GetLastCommittedNavigationEntryForRenderManager();
+  bool force_swap = !is_guest_scheme &&
+      ShouldSwapBrowsingInstancesForNavigation(current_entry, &entry);
+  if (!is_guest_scheme && (ShouldTransitionCrossSite() || force_swap))
+    new_instance = GetSiteInstanceForEntry(entry, current_instance, force_swap);
+
+  // If force_swap is true, we must use a different SiteInstance.  If we didn't,
+  // we would have two RenderFrameHosts in the same SiteInstance and the same
+  // frame, resulting in page_id conflicts for their NavigationEntries.
+  if (force_swap)
+    CHECK_NE(new_instance, current_instance);
+
+  return new_instance;
+}
+
 SiteInstance* RenderFrameHostManager::GetSiteInstanceForEntry(
     const NavigationEntryImpl& entry,
     SiteInstance* current_instance,
     bool force_browsing_instance_swap) {
   // Determine which SiteInstance to use for navigating to |entry|.
   const GURL& dest_url = entry.GetURL();
   NavigationControllerImpl& controller =
       delegate_->GetControllerForRenderManager();
   BrowserContext* browser_context = controller.GetBrowserContext();
 
@@ skipping 147 matching lines @@
   }
 
   // Start the new renderer in a new SiteInstance, but in the current
   // BrowsingInstance.  It is important to immediately give this new
   // SiteInstance to a RenderViewHost (if it is different than our current
   // SiteInstance), so that it is ref counted.  This will happen in
   // CreateRenderView.
   return current_instance->GetRelatedSiteInstance(dest_url);
 }
 
+void RenderFrameHostManager::CreateRenderFrameHostForNewSiteInstance(
+    SiteInstance* old_instance,
+    SiteInstance* new_instance,
+    bool is_main_frame) {
+  // Ensure that we have created RFHs for the new RFH's opener chain if
+  // we are staying in the same BrowsingInstance. This allows the new RFH
+  // to send cross-process script calls to its opener(s).
+  int opener_route_id = MSG_ROUTING_NONE;
+  if (new_instance->IsRelatedSiteInstance(old_instance)) {
+    opener_route_id =
+        delegate_->CreateOpenerRenderViewsForRenderManager(new_instance);
+    if (CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kSitePerProcess)) {
+      // Ensure that the frame tree has RenderFrameProxyHosts for the new
+      // SiteInstance in all nodes except the current one.
+      frame_tree_node_->frame_tree()->CreateProxiesForSiteInstance(
+          frame_tree_node_, new_instance);
+    }
+  }
+
+  // Create a non-swapped-out RFH with the given opener.
+  int route_id = CreateRenderFrame(
+      new_instance, opener_route_id, false, is_main_frame,
+      delegate_->IsHidden());
+  if (route_id == MSG_ROUTING_NONE) {
+    pending_render_frame_host_.reset();
+    return;
+  }
+}
+
 scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrameHost(
     SiteInstance* site_instance,
     int view_routing_id,
     int frame_routing_id,
     bool swapped_out,
     bool hidden) {
   if (frame_routing_id == MSG_ROUTING_NONE)
     frame_routing_id = site_instance->GetProcess()->GetNextRoutingID();
 
   // Create a RVH for main frames, or find the existing one for subframes.
@@ skipping 406 matching lines @@
     const NavigationEntryImpl& entry) {
   // If we are currently navigating cross-process, we want to get back to normal
   // and then navigate as usual.
   if (cross_navigation_pending_) {
     if (pending_render_frame_host_)
       CancelPending();
     cross_navigation_pending_ = false;
   }
 
   SiteInstance* current_instance = render_frame_host_->GetSiteInstance();
-  scoped_refptr<SiteInstance> new_instance = current_instance;
+  scoped_refptr<SiteInstance> new_instance =
+      GetSiteInstanceForNavigation(entry);
 
-  // We do not currently swap processes for navigations in webview tag guests.
-  bool is_guest_scheme = current_instance->GetSiteURL().SchemeIs(kGuestScheme);
-
-  // Determine if we need a new BrowsingInstance for this entry.  If true, this
-  // implies that it will get a new SiteInstance (and likely process), and that
-  // other tabs in the current BrowsingInstance will be unable to script it.
-  // This is used for cases that require a process swap even in the
-  // process-per-tab model, such as WebUI pages.
   const NavigationEntry* current_entry =
       delegate_->GetLastCommittedNavigationEntryForRenderManager();
-  bool force_swap = !is_guest_scheme &&
-      ShouldSwapBrowsingInstancesForNavigation(current_entry, &entry);
-  if (!is_guest_scheme && (ShouldTransitionCrossSite() || force_swap))
-    new_instance = GetSiteInstanceForEntry(entry, current_instance, force_swap);
-
-  // If force_swap is true, we must use a different SiteInstance.  If we didn't,
-  // we would have two RenderFrameHosts in the same SiteInstance and the same
-  // frame, resulting in page_id conflicts for their NavigationEntries.
-  if (force_swap)
-    CHECK_NE(new_instance, current_instance);
 
   if (new_instance != current_instance) {
     // New SiteInstance: create a pending RFH to navigate.
     DCHECK(!cross_navigation_pending_);
 
     // This will possibly create (set to NULL) a Web UI object for the pending
     // page. We'll use this later to give the page special access. This must
     // happen before the new renderer is created below so it will get bindings.
     // It must also happen after the above conditional call to CancelPending(),
     // otherwise CancelPending may clear the pending_web_ui_ and the page will
     // not have its bindings set appropriately.
     SetPendingWebUI(entry);
-
-    // Ensure that we have created RFHs for the new RFH's opener chain if
-    // we are staying in the same BrowsingInstance. This allows the pending RFH
-    // to send cross-process script calls to its opener(s).
-    int opener_route_id = MSG_ROUTING_NONE;
-    if (new_instance->IsRelatedSiteInstance(current_instance)) {
-      opener_route_id =
-          delegate_->CreateOpenerRenderViewsForRenderManager(new_instance);
-
-      if (CommandLine::ForCurrentProcess()->HasSwitch(
-              switches::kSitePerProcess)) {
-        // Ensure that the frame tree has RenderFrameProxyHosts for the new
-        // SiteInstance in all nodes except the current one.
-        frame_tree_node_->frame_tree()->CreateProxiesForSiteInstance(
-            frame_tree_node_, new_instance);
-      }
+    CreateRenderFrameHostForNewSiteInstance(
+        current_instance, new_instance, frame_tree_node_->IsMainFrame());
+    if (!pending_render_frame_host_.get()) {
+      return NULL;
     }
 
-    // Create a non-swapped-out pending RFH with the given opener and navigate
-    // it.
-    int route_id = CreateRenderFrame(new_instance,
-                                     opener_route_id,
-                                     false,
-                                     frame_tree_node_->IsMainFrame(),
-                                     delegate_->IsHidden());
-    if (route_id == MSG_ROUTING_NONE)
-      return NULL;
-
     // Check if our current RFH is live before we set up a transition.
     if (!render_frame_host_->render_view_host()->IsRenderViewLive()) {
       if (!cross_navigation_pending_) {
         // The current RFH is not live.  There's no reason to sit around with a
         // sad tab or a newly created RFH while we wait for the pending RFH to
         // navigate.  Just switch to the pending RFH now and go back to non
         // cross-navigating (Note that we don't care about on{before}unload
         // handlers if the current RFH isn't live.)
         CommitPending();
         return render_frame_host_.get();
@@ skipping 198 matching lines @@
 void RenderFrameHostManager::DeleteRenderFrameProxyHost(
     SiteInstance* instance) {
   RenderFrameProxyHostMap::iterator iter = proxy_hosts_.find(instance->GetId());
   if (iter != proxy_hosts_.end()) {
     delete iter->second;
     proxy_hosts_.erase(iter);
   }
 }
 
 }  // namespace content