Instant Extended: Fallback to local preview if the remote instant page is not ready on user input.

chrome/browser/instant/instant_loader.h

Index: chrome/browser/instant/instant_loader.h
diff --git a/chrome/browser/instant/instant_loader.h b/chrome/browser/instant/instant_loader.h
index 185d2ff53e9317c3b7838c66ac3adf826f2e5c61..4e999af969d4f28d2f34488d575e8ded2289218d 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -82,6 +82,10 @@ class InstantLoader : public InstantClient::Delegate,
     return last_navigation_;
   }
 
+  // Tells the loader that it is in fallback mode.
+  void set_is_in_fallback_mode();
+  bool is_in_fallback_mode() const { return is_in_fallback_mode_; }
+
   // Called by the history tab helper with information that it would have added
   // to the history service had this WebContents not been used for Instant.
   void DidNavigate(const history::HistoryAddPageArgs& add_page_args);
@@ -99,6 +103,7 @@ class InstantLoader : public InstantClient::Delegate,
   void Cancel(const string16& text);
   void SetPopupBounds(const gfx::Rect& bounds);
   void SetMarginSize(int start, int end);
+  void InitializeFonts();
   void SendAutocompleteResults(
       const std::vector<InstantAutocompleteResult>& results);
   void UpOrDownKeyPressed(int count);
@@ -124,6 +129,7 @@ class InstantLoader : public InstantClient::Delegate,
   virtual void AboutToNavigateMainFrame(const GURL& url) OVERRIDE;
   virtual void NavigateToURL(const GURL& url,
                              content::PageTransition transition) OVERRIDE;
+  virtual void RenderViewCreated(content::RenderViewHost* host) OVERRIDE;
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
@@ -148,6 +154,10 @@ class InstantLoader : public InstantClient::Delegate,
   bool is_pointer_down_from_activate_;
   history::HistoryAddPageArgs last_navigation_;
 
+  // Indicates if this loader is running as a fallback loader using the local
+  // preview because the actual instant page was too slow to load.
+  bool is_in_fallback_mode_;
+
   // Used to get notifications about renderers coming and going.
   content::NotificationRegistrar registrar_;