Commit instant loader when the instant page navigates away from instant URL.

chrome/browser/instant/instant_client.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_INSTANT_INSTANT_CLIENT_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CLIENT_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 43 matching lines @@
     // strokes.
     virtual void StartCapturingKeyStrokes() = 0;
 
     // Called when the page wants the browser to stop capturing user key
     // strokes.
     virtual void StopCapturingKeyStrokes() = 0;
 
     // Called when the underlying RenderView crashes.
     virtual void RenderViewGone() = 0;
 
+    // Called when the page is about to navigate.
+    virtual void AboutToNavigateMainFrame(const GURL& url) = 0;
+
    protected:
     virtual ~Delegate();
   };
 
   // Doesn't take ownership of |delegate|.
   explicit InstantClient(Delegate* delegate);
   virtual ~InstantClient();
 
   // Sets |contents| as the page to communicate with. |contents| can be NULL,
   // which effectively stops all communication.
@@ skipping 46 matching lines @@
 
  private:
   // Overridden from content::WebContentsObserver:
   virtual void DidFinishLoad(
       int64 frame_id,
       const GURL& validated_url,
       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;
 
   void SetSuggestions(int page_id,
                       const std::vector<InstantSuggestion>& suggestions);
   void InstantSupportDetermined(int page_id, bool result);
   void ShowInstantPreview(int page_id,
                           InstantShownReason reason,
                           int height,
                           InstantSizeUnits units);
   void StartCapturingKeyStrokes(int page_id);
   void StopCapturingKeyStrokes(int page_id);
 
   Delegate* const delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantClient);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CLIENT_H_