Make RenderFrame{Host} objects routable.

content/browser/renderer_host/render_frame_host_impl.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/renderer_host/render_frame_host_impl.h"
 
+#include "base/containers/hash_tables.h"
+#include "base/lazy_instance.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 
 namespace content {
 
+// The (process id, routing id) pair that identifies one RenderFrame.
+typedef std::pair<int32, int32> RenderFrameHostID;
+typedef base::hash_map<RenderFrameHostID, RenderFrameHostImpl*>
+    RoutingIDFrameMap;
+static base::LazyInstance<RoutingIDFrameMap> g_routing_id_frame_map =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+RenderFrameHostImpl* RenderFrameHostImpl::FromID(
+    int process_id, int routing_id) {
+  RoutingIDFrameMap* frames = g_routing_id_frame_map.Pointer();
+  RoutingIDFrameMap::iterator it = frames->find(
+      RenderFrameHostID(process_id, routing_id));
+  return it == frames->end() ? NULL : it->second;
+}
+
 RenderFrameHostImpl::RenderFrameHostImpl(
     RenderViewHostImpl* render_view_host,
     int routing_id,
-    bool swapped_out)
+    bool is_swapped_out)
     : render_view_host_(render_view_host),
-      routing_id_(routing_id) {
+      routing_id_(routing_id),
+      is_swapped_out_(is_swapped_out) {
+  GetProcess()->AddRoute(routing_id_, this);
+  g_routing_id_frame_map.Get().insert(std::make_pair(
+      RenderFrameHostID(GetProcess()->GetID(), routing_id_),
+      this));
 }
 
 RenderFrameHostImpl::~RenderFrameHostImpl() {
+  GetProcess()->RemoveRoute(routing_id_);
+  g_routing_id_frame_map.Get().erase(
+      RenderFrameHostID(GetProcess()->GetID(), routing_id_));
+
 }
 
 bool RenderFrameHostImpl::Send(IPC::Message* message) {
-  // Use the RenderViewHost object to send the message. It inherits it from
-  // RenderWidgetHost, which ultimately uses the current process's |Send|.
-  return render_view_host_->Send(message);
+  return GetProcess()->Send(message);
 }
 
 bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
-  // Pass the message up to the RenderViewHost, until we have enough
-  // infrastructure to start processing messages in this object.
-  return render_view_host_->OnMessageReceived(msg);
+  return false;
+}
+
+void RenderFrameHostImpl::Init() {
+  GetProcess()->ResumeRequestsForView(routing_id());
+}
+
+RenderProcessHost* RenderFrameHostImpl::GetProcess() const {
+  // TODO(ajwong): This should return its own process once cross-process
+  // subframe navigations are supported.
+  return render_view_host_->GetProcess();
 }
 
 }  // namespace content