chrome: Cleanup class/struct forward declarations

chrome/browser/extensions/api/image_writer_private/operation_manager.h

 // Copyright 2013 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_IMAGE_WRITER_PRIVATE_OPERATION_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_OPERATION_MANAGER_H_
 
 #include <map>
 #include <string>
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/extensions/api/image_writer_private/image_writer_private_api.h"
 #include "chrome/browser/extensions/api/image_writer_private/operation.h"
 #include "chrome/common/extensions/api/image_writer_private.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "extensions/common/extension_id.h"
 #include "url/gurl.h"
 
 namespace image_writer_api = extensions::api::image_writer_private;
 
-class Profile;
-
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 class ExtensionRegistry;
 
 namespace image_writer {
 
 class Operation;
@@ skipping 80 matching lines @@
 
   base::WeakPtrFactory<OperationManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OperationManager);
 };
 
 }  // namespace image_writer
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_OPERATION_MANAGER_H_