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 86cc07e89d487d2eb56e3224bc7a8bd126d12c3f..ae02a471c2300af606c36cc906883ab6d9b38400 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -177,6 +177,13 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
     // hidden state.
     virtual bool IsHidden() = 0;
 
+    // Returns the FrameTreeNode id of the outer WebContents that is hosting
+    // this (inner) WebContents. This FrameTreeNode is the frame that
+    // represents this inner WebContents within the FrameTree of the outer
+    // WebContents. Returns FrameTreeNode::kFrameTreeNodeInvalidID if this
+    // WebContents does not have an outer WebContents.
+    virtual int GetOuterDelegateFrameTreeNodeID() = 0;
+
    protected:
     virtual ~Delegate() {}
   };
@@ -222,7 +229,27 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   // there is no current one.
   RenderWidgetHostView* GetRenderWidgetHostView() const;
 
+  // Returns the RenderWidgetHost of outer WebContents that can be used to fetch
+  // the last keyboard event.
+  // TODO(lazyboy): This can be removed once input events are sent directly to
+  // remote frames.
+  RenderWidgetHostImpl* GetOuterRenderWidgetHostForKeyboardInput();
+
   RenderFrameProxyHost* GetProxyToParent();
+  // Returns the proxy to inner WebContents in the outer WebContents's
+  // SiteInstance. Returns nullptr if this WebContents isn't part of inner/outer
+  // relationship.
+  RenderFrameProxyHost* GetProxyToOuterDelegate();
+
+  // Returns whether this manager belongs to a FrameTreeNode that is a main
+  // frame in an inner WebContents.
+  // TODO(lazyboy): Make this work correctly for subframes inside inner
+  // WebContents too.
+  bool ForInnerDelegate();
+
+  // Removes the FrameTreeNode in the outer WebContents that represents this
+  // FrameTreeNode.
+  void RemoveOuterDelegateFrame();
 
   // Returns the pending RenderFrameHost, or NULL if there is no pending one.
   RenderFrameHostImpl* pending_frame_host() const {
@@ -423,6 +450,17 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
                                    RenderViewHostImpl* render_view_host,
                                    SiteInstance* instance);
 
+  // Called on the RFHM of the inner WebContents to create a
+  // RenderFrameProxyHost for this inner WebContents's frame in its outer
+  // WebContents's SiteInstance. This SiteInstance is for the parent frame
+  // |render_frame_host| in the outer WebContents
+  void CreateOuterDelegateProxy(SiteInstance* outer_contents_site_instance,
+                                RenderFrameHostImpl* render_frame_host);
+
+  // Sets the child RenderWidgetHostView for this frame, which much be part of
+  // an inner WebContents.
+  void SetRWHViewForInnerContents(RenderWidgetHostView* child_rwhv);
+
  private:
   friend class FrameTreeVisualizer;
   friend class NavigatorTestWithBrowserSideNavigation;