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

content/browser/frame_host/render_frame_host_manager.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 
 #include <list>
 
 #include "base/basictypes.h"
@@ skipping 378 matching lines @@
   // PlzNavigate
   // Clears the speculative members, returning the RenderFrameHost to the caller
   // for disposal.
   scoped_ptr<RenderFrameHostImpl> UnsetSpeculativeRenderFrameHost();
 
   // Notification methods to tell this RenderFrameHostManager that the frame it
   // is responsible for has started or stopped loading a document.
   void OnDidStartLoading();
   void OnDidStopLoading();
 
+  void EnsureRenderViewInitialized(FrameTreeNode* source,
+                                   RenderViewHostImpl* render_view_host,
+                                   SiteInstance* instance);
+
  private:
   friend class NavigatorTestWithBrowserSideNavigation;
   friend class RenderFrameHostManagerTest;
   friend class TestWebContents;
 
   FRIEND_TEST_ALL_PREFIXES(CrossProcessFrameTreeBrowserTest,
                            CreateCrossProcessSubframeProxies);
 
   // Used with FrameTree::ForEach to erase RenderFrameProxyHosts from a
   // 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
   // switch.  Can be overridden in unit tests.
   bool ShouldTransitionCrossSite();
 
   // Returns true if for the navigation from |current_effective_url| to
   // |new_effective_url|, a new SiteInstance and BrowsingInstance should be
   // created (even if we are in a process model that doesn't usually swap).
   // This forces a process swap and severs script connections with existing
@@ skipping 249 matching lines @@
   bool should_reuse_web_ui_;
 
   base::WeakPtrFactory<RenderFrameHostManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_