chrome: Cleanup class/struct forward declarations

chrome/browser/extensions/api/webstore_private/webstore_private_api.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_EXTENSIONS_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_
 
 #include <memory>
 #include <string>
 
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_delegate.h"
 #include "chrome/browser/extensions/active_install_data.h"
 #include "chrome/browser/extensions/chrome_extension_function_details.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/webstore_install_helper.h"
 #include "chrome/browser/extensions/webstore_installer.h"
 #include "chrome/common/extensions/api/webstore_private.h"
 #include "chrome/common/extensions/webstore_install_result.h"
 #include "extensions/browser/extension_function.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 class GPUFeatureChecker;
-class GURL;
-
-namespace chrome {
-class BitmapFetcher;
-}  // namespace chrome
 
 namespace extensions {
 
 class Extension;
 
 class WebstorePrivateApi {
  public:
   // Allows you to override the WebstoreInstaller delegate for testing.
   static void SetWebstoreInstallerDelegateForTesting(
       WebstoreInstaller::Delegate* delegate);
@@ skipping 265 matching lines @@
   ExtensionFunction::ResponseAction Run() override;
 
   ExtensionFunction::ResponseValue BuildResponse(bool result);
 
   ChromeExtensionFunctionDetails chrome_details_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_