chrome: Cleanup class/struct forward declarations

chrome/browser/ui/browser_tabstrip.h

 // Copyright (c) 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_BROWSER_TABSTRIP_H_
 #define CHROME_BROWSER_UI_BROWSER_TABSTRIP_H_
 
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/window_open_disposition.h"
 
 class Browser;
 class GURL;
-class Profile;
-
-namespace content {
-class SiteInstance;
-}
 
 namespace gfx {
 class Rect;
 }
 
 namespace chrome {
 
 // Adds a tab to the tab strip of the specified browser and loads |url| into it.
 // If |url| is an empty URL, then the new tab-page is laoded. An |index| of -1
 // means to append it to the end of the tab strip.
@@ skipping 21 matching lines @@
 
 // Closes the specified WebContents in the specified Browser. If
 // |add_to_history| is true, an entry in the historical tab database is created.
 void CloseWebContents(Browser* browser,
                       content::WebContents* contents,
                       bool add_to_history);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_TABSTRIP_H_