BrowserPlugin: Move CreateGuest to chrome

chrome/browser/guest_view/guest_view_manager.cc

 // Copyright 2014 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 "chrome/browser/guest_view/guest_view_manager.h"
 
+#include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/guest_view/guest_view_base.h"
 #include "chrome/browser/guest_view/guest_view_constants.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/result_codes.h"
+#include "content/public/common/url_constants.h"
 #include "extensions/browser/extension_system.h"
+#include "net/base/escape.h"
 #include "url/gurl.h"
 
 using content::BrowserContext;
 using content::SiteInstance;
 using content::WebContents;
 
 // A WebContents does not immediately have a RenderProcessHost. It acquires one
 // on initial navigation. This observer exists until that initial navigation in
 // order to grab the ID if tis RenderProcessHost so that it can register it as
 // a guest.
@@ skipping 45 matching lines @@
     guest_manager = new GuestViewManager(context);
     context->SetUserData(guestview::kGuestViewManagerKeyName, guest_manager);
   }
   return guest_manager;
 }
 
 int GuestViewManager::GetNextInstanceID() {
   return ++current_instance_id_;
 }
 
+content::WebContents* GuestViewManager::CreateGuest(
+    content::SiteInstance* embedder_site_instance,
+    int instance_id,
+    const content::StorageInfo& storage_info,
+    scoped_ptr<base::DictionaryValue> extra_params) {
+  content::RenderProcessHost* embedder_process_host =
+      embedder_site_instance->GetProcess();
+  // Validate that the partition id coming from the renderer is valid UTF-8,
+  // since we depend on this in other parts of the code, such as FilePath
+  // creation. If the validation fails, treat it as a bad message and kill the
+  // renderer process.
+  if (!IsStringUTF8(storage_info.partition_id)) {
+    content::RecordAction(
+        base::UserMetricsAction("BadMessageTerminate_BPGM"));
+    base::KillProcess(
+        embedder_process_host->GetHandle(),
+        content::RESULT_CODE_KILLED_BAD_MESSAGE, false);
+    return NULL;
+  }
+
+  const GURL& embedder_site_url = embedder_site_instance->GetSiteURL();
+  const std::string& host = embedder_site_url.host();
+
+  std::string url_encoded_partition = net::EscapeQueryParamValue(
+      storage_info.partition_id, false);
+  // The SiteInstance of a given webview tag is based on the fact that it's
+  // a guest process in addition to which platform application the tag
+  // belongs to and what storage partition is in use, rather than the URL
+  // that the tag is being navigated to.
+  GURL guest_site(base::StringPrintf("%s://%s/%s?%s",
+                                     content::kGuestScheme,
+                                     host.c_str(),
+                                     storage_info.persist ? "persist" : "",
+                                     url_encoded_partition.c_str()));
+
+  // If we already have a webview tag in the same app using the same storage
+  // partition, we should use the same SiteInstance so the existing tag and
+  // the new tag can script each other.
+  SiteInstance* guest_site_instance = GetGuestSiteInstance(guest_site);
+  if (!guest_site_instance) {
+    // Create the SiteInstance in a new BrowsingInstance, which will ensure
+    // that webview tags are also not allowed to send messages across
+    // different partitions.
+    guest_site_instance = SiteInstance::CreateForURL(
+        embedder_site_instance->GetBrowserContext(), guest_site);
+  }
+  WebContents::CreateParams create_params(
+      embedder_site_instance->GetBrowserContext(),
+      guest_site_instance);
+  create_params.guest_instance_id = instance_id;
+  create_params.guest_extra_params.reset(extra_params.release());
+  WebContents* guest_web_contents = WebContents::Create(create_params);
+  return guest_web_contents;
+}
+
 void GuestViewManager::AddGuest(int guest_instance_id,
                                 WebContents* guest_web_contents) {
   DCHECK(guest_web_contents_by_instance_id_.find(guest_instance_id) ==
          guest_web_contents_by_instance_id_.end());
   guest_web_contents_by_instance_id_[guest_instance_id] = guest_web_contents;
   // This will add the RenderProcessHost ID when we get one.
   new GuestWebContentsObserver(guest_web_contents);
 }
 
 void GuestViewManager::RemoveGuest(int guest_instance_id) {
@@ skipping 122 matching lines @@
       return false;
 
     return embedder_render_process_id ==
         guest->GetOpener()->GetEmbedderWebContents()->GetRenderProcessHost()->
             GetID();
   }
 
   return embedder_render_process_id ==
       guest->embedder_web_contents()->GetRenderProcessHost()->GetID();
 }