Implement SearchTabHelperDelegate.

chrome/browser/ui/search/search_tab_helper.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_SEARCH_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 12 matching lines @@
 namespace content {
 class WebContents;
 struct LoadCommittedDetails;
 }
 
 class GURL;
 class InstantPageTest;
 class InstantService;
 class Profile;
 class SearchIPCRouterTest;
+class SearchTabHelperDelegate;
 
 // Per-tab search "helper".  Acts as the owner and controller of the tab's
 // search UI model.
 //
 // When the page is finished loading, SearchTabHelper determines the instant
 // support for the page. When a navigation entry is committed (except for
 // in-page navigations), SearchTabHelper resets the instant support state to
 // INSTANT_SUPPORT_UNKNOWN and cause support to be determined again.
 class SearchTabHelper : public content::WebContentsObserver,
                         public content::WebContentsUserData<SearchTabHelper>,
@@ skipping 42 matching lines @@
 
   // Called when the tab corresponding to |this| instance is deactivated.
   void OnTabDeactivated();
 
   // Tells the page to toggle voice search.
   void ToggleVoiceSearch();
 
   // Returns true if the underlying page is a search results page.
   bool IsSearchResultsPage();
 
+  void set_delegate(SearchTabHelperDelegate* delegate) { delegate_ = delegate; }
+
  private:
   friend class content::WebContentsUserData<SearchTabHelper>;
   friend class InstantPageTest;
   friend class SearchIPCRouterPolicyTest;
   friend class SearchIPCRouterTest;
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
                            DetermineIfPageSupportsInstant_Local);
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
                            DetermineIfPageSupportsInstant_NonLocal);
   FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
@@ skipping 69 matching lines @@
       int position, const base::string16& provider) OVERRIDE;
   virtual void PasteIntoOmnibox(const base::string16& text) OVERRIDE;
   virtual void OnChromeIdentityCheck(const base::string16& identity) OVERRIDE;
 
   // Overridden from InstantServiceObserver:
   virtual void ThemeInfoChanged(const ThemeBackgroundInfo& theme_info) OVERRIDE;
   virtual void MostVisitedItemsChanged(
       const std::vector<InstantMostVisitedItem>& items) OVERRIDE;
   virtual void OmniboxStartMarginChanged(int omnibox_start_margin) OVERRIDE;
 
-  // Removes recommended URLs if a matching URL is already open in the Browser,
-  // if the Most Visited Tile Placement experiment is enabled, and the client is
-  // in the experiment group.
-  void MaybeRemoveMostVisitedItems(std::vector<InstantMostVisitedItem>* items);
-
   // Sets the mode of the model based on the current URL of web_contents().
   // Only updates the origin part of the mode if |update_origin| is true,
   // otherwise keeps the current origin. If |is_preloaded_ntp| is true, the mode
   // is set to NTP regardless of the current URL; this is used to ensure that
   // InstantController can bind InstantTab to new tab pages immediately.
   void UpdateMode(bool update_origin, bool is_preloaded_ntp);
 
   // Tells the renderer to determine if the page supports the Instant API, which
   // results in a call to OnInstantSupportDetermined() when the reply is
   // received.
@@ skipping 16 matching lines @@
 
   // Model object for UI that cares about search state.
   SearchModel model_;
 
   content::WebContents* web_contents_;
 
   SearchIPCRouter ipc_router_;
 
   InstantService* instant_service_;
 
+  // Delegate for notifying our owner about the SearchTabHelper state. Not owned
+  // by us.
+  // NULL on iOS and Android because they don't use the Instant framework.
+  SearchTabHelperDelegate* delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(SearchTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_