chrome: Cleanup class/struct forward declarations

chrome/browser/ui/extensions/settings_api_bubble_helpers.h

 // Copyright 2016 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_EXTENSIONS_SETTINGS_API_BUBBLE_HELPERS_H_
 #define CHROME_BROWSER_UI_EXTENSIONS_SETTINGS_API_BUBBLE_HELPERS_H_
 
 #include "components/omnibox/browser/autocomplete_match.h"
 
 class Browser;
-class Profile;
 
 namespace content {
 class WebContents;
 }
 
 namespace extensions {
 
 // Shows a bubble notifying the user that the homepage is controlled by an
 // extension. This bubble is shown only on the first use of the Home button
 // after the controlling extension takes effect.
 void MaybeShowExtensionControlledHomeNotification(Browser* browser);
 
 // Shows a bubble notifying the user that the search engine is controlled by an
 // extension. This bubble is shown only on the first search after the
 // controlling extension takes effect.
 void MaybeShowExtensionControlledSearchNotification(
     content::WebContents* web_contents,
     AutocompleteMatch::Type match_type);
 
 // Shows a bubble notifying the user that the new tab page is controlled by an
 // extension. This bubble is shown only the first time the new tab page is shown
 // after the controlling extension takes effect.
 void MaybeShowExtensionControlledNewTabPage(
     Browser* browser,
     content::WebContents* web_contents);
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_UI_EXTENSIONS_SETTINGS_API_BUBBLE_HELPERS_H_