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 10 matching lines @@
 #include "ui/base/window_open_disposition.h"
 
 namespace content {
 class WebContents;
 struct LoadCommittedDetails;
 }
 
 class GURL;
 class InstantPageTest;
 class InstantService;
+class OmniboxView;
 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 99 matching lines @@
   Profile* profile() const;
 
   // Helper function to navigate the given contents to the local fallback
   // Instant URL and trim the history correctly.
   void RedirectToLocalNTP();
 
   // Returns whether input is in progress, i.e. if the omnibox has focus and the
   // active tab is in mode SEARCH_SUGGESTIONS.
   bool IsInputInProgress() const;
 
+  // Returns the OmniboxView for |web_contents_| or NULL if not available.
+  OmniboxView* GetOmniboxView() const;
+
   const bool is_search_enabled_;
 
   // 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_