Fall back to local page if online NTP fails to load.

chrome/browser/ui/search/instant_controller.h

 // Copyright 2012 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 CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 223 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest,
                            OmniboxCommitsWhenShownFullHeight);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, LocalNTPIsNotPreloaded);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, OverlayRenderViewGone);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, OverlayDoesntSupportInstant);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedManualTest,
                            MANUAL_OmniboxFocusLoadsInstant);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedManualTest,
                            MANUAL_BackspaceFromQueryToSelectedUrlAndNavigate);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, OnDefaultSearchProviderChanged);
+  FRIEND_TEST_ALL_PREFIXES(
+      InstantExtendedOnlineTest, RedirectToLocalOnLoadFailure);
 
   Profile* profile() const;
   InstantOverlay* overlay() const;
   InstantTab* instant_tab() const;
   InstantNTP* ntp() const;
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
@@ skipping 18 matching lines @@
       const content::WebContents* contents,
       int height,
       InstantSizeUnits units) OVERRIDE;
   virtual void FocusOmnibox(const content::WebContents* contents,
                             OmniboxFocusState state) OVERRIDE;
   virtual void NavigateToURL(
       const content::WebContents* contents,
       const GURL& url,
       content::PageTransition transition,
       WindowOpenDisposition disposition) OVERRIDE;
+  virtual void InstantPageLoadFailed(content::WebContents* contents) OVERRIDE;
 
   // Invoked by the InstantLoader when the Instant page wants to delete a
   // Most Visited item.
   virtual void DeleteMostVisitedItem(InstantRestrictedID most_visited_item_id)
       OVERRIDE;
 
   // Invoked by the InstantLoader when the Instant page wants to undo a
   // Most Visited deletion.
   virtual void UndoMostVisitedDeletion(InstantRestrictedID most_visited_item_id)
       OVERRIDE;
 
   // Invoked by the InstantLoader when the Instant page wants to undo all
   // Most Visited deletions.
   virtual void UndoAllMostVisitedDeletions() OVERRIDE;
 
+  // Helper function to navigate the given contents to the local fallback
+  // Instant URL and trim the history correctly.
+  void RedirectToLocalNTP(content::WebContents* contents);
+
   // Helper for OmniboxFocusChanged. Commit or discard the overlay.
   void OmniboxLostFocus(gfx::NativeView view_gaining_focus);
 
   // Returns the local Instant URL. (Just a convenience wrapper around
   // chrome::GetLocalInstantURL.)
   std::string GetLocalInstantURL() const;
 
   // Returns the correct Instant URL to use from the following possibilities:
   //   o The default search engine's Instant URL
   //   o The --instant-url command line switch
@@ skipping 24 matching lines @@
 
   // Called from Update() to set up the appropriate page to send user updates
   // to. May reset |instant_tab_| or switch to a local fallback |overlay_| as
   // necessary.
   bool SetUpInstantPageForUpdate();
 
   // If the active tab is an Instant search results page, sets |instant_tab_| to
   // point to it. Else, deletes any existing |instant_tab_|.
   void ResetInstantTab();
 
+  // Sends theme info, omnibox bounds, font info, etc. down to the Instant tab.
+  void UpdateInfoForInstantTab();
+
   // Hide the overlay. Also sends an onchange event (with blank query) to the
   // overlay, telling it to clear out results for any old queries.
   void HideOverlay();
 
   // Like HideOverlay(), but doesn't call OnStaleOverlay(). Use HideOverlay()
   // unless you are going to call overlay_.reset() yourself subsequently.
   void HideInternal();
 
   // Counterpart to HideOverlay(). Asks the |browser_| to display the overlay
   // with the given |height| in |units|.
@@ skipping 120 matching lines @@
   // Used for Top Sites async retrieval.
   base::WeakPtrFactory<InstantController> weak_ptr_factory_;
 
   // Used to get notifications about Most Visted changes.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_