Navigation transitions: Place transition page in same process as destination page.

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 b7039f5cbe7b8a6959f6c2d93bb69a65f7f27c21..61b5b26264c045d72c2138bdd88763bacb9a3bf4 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -227,7 +227,8 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   // until ResumeResponseDeferredAtStart.
   void OnDeferredAfterResponseStarted(
       const GlobalRequestID& global_request_id,
-      RenderFrameHostImpl* pending_render_frame_host);
+      RenderFrameHostImpl* pending_render_frame_host,
+      const GURL& transition_url);
 
   // Resume navigation paused after receiving response headers.
   void ResumeResponseDeferredAtStart();
@@ -349,6 +350,19 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
     bool should_replace_current_entry;
   };
 
+  struct TransitionParams {
+    TransitionParams(const GlobalRequestID& global_request_id,
+                     const GURL& transition_url);
+    ~TransitionParams();
+
+    // The child ID and request ID for the pending navigation.  Present whether
+    // |request_transfer| is NULL or not.
+    GlobalRequestID global_request_id;
+
+    // This is the transition url used to store/lookup the current process id.
+    GURL transition_url;
+  };
+
   // Used with FrameTree::ForEach to erase RenderFrameProxyHosts from a
   // FrameTreeNode's RenderFrameHostManager.
   static bool ClearProxiesInSiteInstance(int32 site_instance_id,
@@ -470,7 +484,7 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
 
   // Tracks information about any navigation paused after receiving response
   // headers.
-  scoped_ptr<GlobalRequestID> response_started_id_;
+  scoped_ptr<TransitionParams> response_started_params_;
 
   // If either of these is non-NULL, the pending navigation is to a chrome:
   // page. The scoped_ptr is used if pending_web_ui_ != web_ui_, the WeakPtr is