Move instant support to SearchTabHelper.

chrome/browser/ui/search/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_SEARCH_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 226 matching lines @@
 
   // Returns the transition type of the last AutocompleteMatch passed to Update.
   content::PageTransition last_transition_type() const {
     return last_transition_type_;
   }
 
   // Non-const for Add/RemoveObserver only.  Other model changes should only
   // happen through the InstantController interface.
   InstantOverlayModel* model() { return &model_; }
 
+  // Used by BrowserInstantController to notify InstantController about the
+  // instant support change event for the active web contents.
+  void InstantSupportChanged(InstantSupportState instant_support);
+
  protected:
   // Accessors are made protected for testing purposes.
   virtual bool extended_enabled() const;
 
   virtual InstantOverlay* overlay() const;
   virtual InstantTab* instant_tab() const;
   virtual InstantNTP* ntp() const;
 
   virtual Profile* profile() const;
 
@@ skipping 304 matching lines @@
   // MODE_SEARCH_SUGGESTIONS, except in those cases where this is false.
   bool allow_overlay_to_show_search_suggestions_;
 
   // List of events and their timestamps, useful in debugging Instant behaviour.
   mutable std::list<std::pair<int64, std::string> > debug_events_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_