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

content/browser/frame_host/navigation_entry_impl.h

Index: content/browser/frame_host/navigation_entry_impl.h
diff --git a/content/browser/frame_host/navigation_entry_impl.h b/content/browser/frame_host/navigation_entry_impl.h
index 613f45edb42b039a7f1d1a2a6830610a60c8e4f6..c6fee291fb5da6f8904e971ca3da1a00167cadc5 100644
--- a/content/browser/frame_host/navigation_entry_impl.h
+++ b/content/browser/frame_host/navigation_entry_impl.h
@@ -89,6 +89,8 @@ class CONTENT_EXPORT NavigationEntryImpl
   virtual void SetRedirectChain(const std::vector<GURL>& redirects) OVERRIDE;
   virtual const std::vector<GURL>& GetRedirectChain() const OVERRIDE;
   virtual bool IsRestored() const OVERRIDE;
+  virtual void SetVirtualURLForTransition(const GURL& url) OVERRIDE;
+  virtual const GURL& GetVirtualURLForTransition() const OVERRIDE;
 
   // Once a navigation entry is committed, we should no longer track several
   // pieces of non-persisted state, as documented on the members below.
@@ -338,6 +340,12 @@ class CONTENT_EXPORT NavigationEntryImpl
   // time (see TabNavigation for an example of this).
   std::map<std::string, base::string16> extra_data_;
 
+  // The virtual URL, when nonempty, will override the actual URL of the page
+  // when we determine the site instance to use. This allows us to redirect
+  // a url to a particular process if need be. This entry is not persisted
+  // since it's only used by the embedder's transition layer.
+  GURL virtual_url_for_transition;
+
   // Copy and assignment is explicitly allowed for this class.
 };