Adding RenderWidgetHostViewChildFrame for OOPIF view.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 127d96adfb5e711eddb12371708a01316fbd4e1b..223030975b8bf2496ded72c06d693704e054c22e 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -19,6 +19,7 @@ class FilePath;
 
 namespace content {
 
+class CrossProcessFrameConnector;
 class FrameTree;
 class RenderFrameHostDelegate;
 class RenderProcessHost;
@@ -50,6 +51,8 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
   RenderViewHostImpl* render_view_host() { return render_view_host_; }
   RenderFrameHostDelegate* delegate() { return delegate_; }
 
+  void SetCrossProcessFrameConnector(CrossProcessFrameConnector*);

[Charlie Reis, 2013/12/12 02:42:05]

style: Please name parameters in .h files.

[kenrb, 2013/12/13 18:41:17]

Done.

+
  protected:
   friend class RenderFrameHostFactory;
 
@@ -77,6 +80,11 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
 
   RenderFrameHostDelegate* delegate_;
 
+  // Object that handles messages destined to a child frame in another
+  // process from its parent.
+  // This will move to RenderFrameProxyHost when that class is created.

[Charlie Reis, 2013/12/12 02:42:05]

Does that mean it's only used (i.e., non-NULL) when this RFH is swapped out?

[kenrb, 2013/12/13 18:41:17]

Yes, although it will also be NULL on swapped out RFH's that correspond to
frames that are not direct children (which I don't think we have, yet).

I have made the comment more explicit about that.

+  CrossProcessFrameConnector* cross_process_frame_connector_;
+
   // Reference to the whole frame tree that this RenderFrameHost belongs too.
   // Allows this RenderFrameHost to add and remove nodes in response to
   // messages from the renderer requesting DOM manipulation.