Make <webview> use out-of-process iframe architecture.

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index 1c77b3eb3f48401f1237148a3056478ffe0c4438..81ef52fad47ee548d7f120434ddf0a54489be516 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -175,6 +175,11 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
     // hidden state.
     virtual bool IsHidden() = 0;
 
+    // Returns the FTN id of the embedder delegate (WebContents) that is hosting

[Charlie Reis, 2015/05/19 07:12:31]

Let's update all the embedder/guest references to outer/inner WebContents.

[lazyboy, 2015/05/21 23:23:47]

See overall CL comment.
Done.

+    // this delegate (WebContents). Returns  -1 if this WebContents does not
+    // have embedder delegate.
+    virtual int64 GetEmbedderFrameTreeNodeID() = 0;
+
    protected:
     virtual ~Delegate() {}
   };
@@ -221,6 +226,10 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   RenderWidgetHostView* GetRenderWidgetHostView() const;
 
   RenderFrameProxyHost* GetProxyToParent();
+  RenderFrameProxyHost* GetProxyToEmbedder();
+
+  // Returns whether this manager belongs to a FTN that is a guest main frame.
+  bool IsGuest();
 
   // Returns the pending RenderFrameHost, or NULL if there is no pending one.
   RenderFrameHostImpl* pending_frame_host() const {
@@ -427,6 +436,19 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
                                    RenderViewHostImpl* render_view_host,
                                    SiteInstance* instance);
 
+  // Called on the guest RFHM to create a proxy for this guest frame in its
+  // embedder process.
+  // Returns the proxy routing ID.
+  int CreateEmbedderProxy(SiteInstance* embedder_site_instance);
+
+  // Called on the embedder RFHM to replace the initial guest frame in the
+  // embedder with the proxy that has routing id
+  // |proxy_to_embedder_routing_id|.
+  void ReplaceWithGuestProxy(int proxy_to_embedder_routing_id);
+
+  // Sets the child RWHV for this guest frame.
+  void SetGuestRWHView(RenderWidgetHostView* child_rwhv);
+
  private:
   friend class FrameTreeVisualizer;
   friend class NavigatorTestWithBrowserSideNavigation;