Reload Instant NTP and Instant-process tabs on search url change

chrome/browser/ui/browser_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_BROWSER_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/prefs/pref_change_registrar.h"
+#include "chrome/browser/search/instant_service_observer.h"
 #include "chrome/browser/ui/search/instant_controller.h"
 #include "chrome/browser/ui/search/instant_unload_handler.h"
 #include "chrome/browser/ui/search/search_model_observer.h"
 #include "ui/base/window_open_disposition.h"
 
 class Browser;
 struct InstantSuggestion;
 class Profile;
 
 namespace content {
 class WebContents;
 }
 
 namespace gfx {
 class Rect;
 }
 
-class BrowserInstantController : public SearchModelObserver {
+class BrowserInstantController : public SearchModelObserver,
+                                 public InstantServiceObserver {
  public:
   explicit BrowserInstantController(Browser* browser);
   virtual ~BrowserInstantController();
 
   // If |url| is the new tab page URL, set |target_contents| to the preloaded
   // NTP contents from InstantController. If |source_contents| is not NULL, we
   // replace it with the new |target_contents| in the tabstrip and delete
   // |source_contents|. Otherwise, the caller owns |target_contents| and is
   // responsible for inserting it into the tabstrip.
   //
@@ skipping 40 matching lines @@
   void SetOmniboxBounds(const gfx::Rect& bounds);
 
   // Notifies |instant_| to toggle voice search.
   void ToggleVoiceSearch();
 
  private:
   // Overridden from search::SearchModelObserver:
   virtual void ModelChanged(const SearchModel::State& old_state,
                             const SearchModel::State& new_state) OVERRIDE;
 
-  // Called when the default search provider changes. Revokes the searchbox API
-  // privileges for any existing WebContents (that belong to the erstwhile
-  // default search provider) by simply reloading all such WebContents. This
-  // ensures that they are reloaded in a non-privileged renderer process.
-  void OnDefaultSearchProviderChanged(const std::string& pref_name);
+  // Overridden from InstantServiceObserver:
+  virtual void DefaultSearchProviderChanged() OVERRIDE;
+  virtual void GoogleURLUpdated() OVERRIDE;
+
+  // Reloads the tabs in instant process to ensure that their privileged status
+  // is still valid.
+  void ReloadTabsInInstantProcess();
 
   // Replaces the contents at tab |index| with |new_contents| and deletes the
   // existing contents.
   void ReplaceWebContentsAt(int index,
                             scoped_ptr<content::WebContents> new_contents);
 
   Browser* const browser_;
 
   InstantController instant_;
   InstantUnloadHandler instant_unload_handler_;
 
-  PrefChangeRegistrar profile_pref_registrar_;
-
   DISALLOW_COPY_AND_ASSIGN(BrowserInstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_