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

chrome/browser/ui/search/instant_page.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 CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/string16.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/omnibox_focus_state.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/page_transition_types.h"
 
 class GURL;
 
 namespace content {
 class WebContents;
+struct FrameNavigateParams;
+struct LoadCommittedDetails;
 }
 
 namespace gfx {
 class Rect;
 }
 
 // InstantPage is used to exchange messages with a page that implements the
 // Instant/Embedded Search API (http://dev.chromium.org/embeddedsearch).
 // InstantPage is not used directly but via one of its derived classes:
 // InstantOverlay, InstantNTP and InstantTab.
@@ skipping 52 matching lines @@
     virtual void DeleteMostVisitedItem(
         InstantRestrictedID most_visited_item_id) = 0;
 
     // Called when the SearchBox wants to undo a Most Visited deletion.
     virtual void UndoMostVisitedDeletion(
         InstantRestrictedID most_visited_item_id) = 0;
 
     // Called when the SearchBox wants to undo all Most Visited deletions.
     virtual void UndoAllMostVisitedDeletions() = 0;
 
+    // Called when the preloaded NTP is ready for display.
+    virtual void InstantPageLoadFailed(content::WebContents* contents) = 0;
+
    protected:
     virtual ~Delegate();
   };
 
   virtual ~InstantPage();
 
   // The WebContents corresponding to the page we're talking to. May be NULL.
   content::WebContents* contents() const { return web_contents(); }
 
   // Returns true if the page is known to support the Instant API. This starts
@@ skipping 100 matching lines @@
       bool is_main_frame,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& url,
       content::PageTransition transition_type,
       content::RenderViewHost* render_view_host) OVERRIDE;
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+  virtual void DidFailProvisionalLoad(
+      int64 frame_id,
+      bool is_main_frame,
+      const GURL& validated_url,
+      int error_code,
+      const string16& error_description,
+      content::RenderViewHost* render_view_host) OVERRIDE;
 
   void OnSetSuggestions(int page_id,
                         const std::vector<InstantSuggestion>& suggestions);
   void OnInstantSupportDetermined(int page_id, bool supports_instant);
   void OnShowInstantOverlay(int page_id,
                             int height,
                             InstantSizeUnits units);
   void OnFocusOmnibox(int page_id, OmniboxFocusState state);
   void OnSearchBoxNavigate(int page_id,
                            const GURL& url,
                            content::PageTransition transition,
                            WindowOpenDisposition disposition);
   void OnDeleteMostVisitedItem(InstantRestrictedID most_visited_item_id);
   void OnUndoMostVisitedDeletion(InstantRestrictedID most_visited_item_id);
   void OnUndoAllMostVisitedDeletions();
 
   Delegate* const delegate_;
   bool supports_instant_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantPage);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_PAGE_H_