Ensure that before creating proxy of site A, RVH of site A is initialized.

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 cf6c54421c68e92f438309872c9f0fa6b158e90d..e46e996e5073967bbea8848873c7fb4752556cdd 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -396,6 +396,10 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   void OnDidStartLoading();
   void OnDidStopLoading();
 
+  void EnsureRenderViewInitialized(FrameTreeNode* source,
+                                   RenderViewHostImpl* render_view_host,
+                                   SiteInstance* instance);
+
  private:
   friend class NavigatorTestWithBrowserSideNavigation;
   friend class RenderFrameHostManagerTest;
@@ -408,6 +412,10 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   // FrameTreeNode's RenderFrameHostManager.
   static bool ClearProxiesInSiteInstance(int32 site_instance_id,
                                          FrameTreeNode* node);
+  // Used with FrameTree::ForEach to reset initialized state of
+  // RenderFrameProxyHosts from a FrameTreeNode's RenderFrameHostManager.
+  static bool ResetProxiesInSiteInstanceForNewProcess(int32 site_instance_id,

[nasko, 2015/01/20 23:51:23]

nit: The "ForNewProcess" doesn't add much to the name of the method, so it might
be better to drop it for readability.

[lazyboy, 2015/01/21 18:52:14]

Done.

+                                                      FrameTreeNode* node);
 
   // Returns whether this tab should transition to a new renderer for
   // cross-site URLs.  Enabled unless we see the --process-per-tab command line