Remove DetermineIfPageSupportsInstant and all its plumbing

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/gtest_prod_util.h"
@@ skipping 145 matching lines @@
       const std::vector<InstantMostVisitedItem>& items) override;
 
   // Invoked to update the instant support state.
   void InstantSupportChanged(bool supports_instant);
 
   // 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.
   void UpdateMode(bool update_origin);
 
-  // Tells the renderer to determine if the page supports the Instant API, which
-  // results in a call to OnInstantSupportDetermined() when the reply is
-  // received.
-  void DetermineIfPageSupportsInstant();
-
   OmniboxView* GetOmniboxView();
   const OmniboxView* GetOmniboxView() const;
 
   Profile* profile() const;
 
   // 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;
 
   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_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_