chrome: Cleanup class/struct forward declarations

chrome/browser/renderer_host/pepper/pepper_flash_browser_host.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_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
 
 namespace base {
 class Time;
 }
 
 namespace content {
 class BrowserPpapiHost;
-class ResourceContext;
 }
 
 namespace content_settings {
 class CookieSettings;
 }
 
 namespace device {
 class PowerSaveBlocker;
 }
 
@@ skipping 38 matching lines @@
   // For fetching the Flash LSO settings.
   scoped_refptr<content_settings::CookieSettings> cookie_settings_;
   base::WeakPtrFactory<PepperFlashBrowserHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperFlashBrowserHost);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_