chrome: Cleanup class/struct forward declarations

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 <stdint.h>
 
 #include <list>
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/ui/search/instant_tab.h"
 #include "chrome/common/search/search_types.h"
 
 class BrowserInstantController;
 class GURL;
 class InstantService;
-class Profile;
 
 namespace content {
 class WebContents;
 }
 
 // InstantController drives Chrome Instant, i.e., the browser implementation of
 // the Embedded Search API (see http://dev.chromium.org/embeddedsearch).
 //
 // In extended mode, InstantController maintains and coordinates an InstantTab.
 // An InstantTab instance points to the currently active tab, if it supports the
@@ skipping 81 matching lines @@
   // The search model mode for the active tab.
   SearchMode search_mode_;
 
   // List of events and their timestamps, useful in debugging Instant behaviour.
   mutable std::list<std::pair<int64_t, std::string>> debug_events_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_