Remove InstantTab::Delegate::InstantSupportDetermined

chrome/browser/ui/search/instant_tab.h

 // Copyright 2013 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_INSTANT_TAB_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_TAB_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "chrome/browser/ui/search/search_model_observer.h"
 #include "content/public/browser/web_contents_observer.h"
-#include "ui/base/page_transition_types.h"
 
 class GURL;
 
 namespace content {
 class WebContents;
 }
 
 // InstantTab is used to exchange messages with a page that implements the
 // Instant/Embedded Search API (http://dev.chromium.org/embeddedsearch).
-class InstantTab : public content::WebContentsObserver,
-                   public SearchModelObserver {
+class InstantTab : public content::WebContentsObserver {
  public:
   // InstantTab calls its delegate in response to messages received from the
   // page. Each method is called with the |contents| corresponding to the page
   // we are observing.
   class Delegate {
    public:
-    // Called upon determination of Instant API support. Either in response to
-    // the page loading or because we received some other message.
-    virtual void InstantSupportDetermined(const content::WebContents* contents,
-                                          bool supports_instant) = 0;
-
     // Called when the page is about to navigate to |url|.
     virtual void InstantTabAboutToNavigateMainFrame(
         const content::WebContents* contents,
         const GURL& url) = 0;
 
    protected:
     virtual ~Delegate();
   };
 
-  explicit InstantTab(Delegate* delegate, content::WebContents* web_contents);
-
+  InstantTab(Delegate* delegate, content::WebContents* web_contents);
   ~InstantTab() override;
 
   // Sets up communication with the WebContents passed to the constructor. Does
   // nothing if that WebContents was null. Should not be called more than once.
   void Init();
 
  private:
   // Overridden from content::WebContentsObserver:
   void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override;
 
-  // Overridden from SearchModelObserver:
-  void ModelChanged(const SearchModel::State& old_state,
-                    const SearchModel::State& new_state) override;
-
-  void InstantSupportDetermined(bool supports_instant);
-
   Delegate* const delegate_;
 
   content::WebContents* pending_web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantTab);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_TAB_H_