WebView: Cleanup class/struct forward declarations

android_webview/browser/net/init_native_callback.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 ANDROID_WEBVIEW_BROWSER_NET_INIT_NATIVE_CALLBACK_H_
 #define ANDROID_WEBVIEW_BROWSER_NET_INIT_NATIVE_CALLBACK_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace net {
 class CookieStore;
 class URLRequestInterceptor;
 }  // namespace net
 
 namespace android_webview {
-class AwBrowserContext;
 
 // Gets the TaskRunner that the CookieStore must be called on.
 scoped_refptr<base::SingleThreadTaskRunner> GetCookieStoreTaskRunner();
 
 // Gets a pointer to the CookieStore managed by the CookieManager.
 // The CookieStore is never deleted. May only be called on the
 // CookieStore's TaskRunner.
 net::CookieStore* GetCookieStore();
 
 // Called lazily when the job factory is being constructed.
 std::unique_ptr<net::URLRequestInterceptor>
 CreateAndroidAssetFileRequestInterceptor();
 
 // Called lazily when the job factory is being constructed.
 std::unique_ptr<net::URLRequestInterceptor>
 CreateAndroidContentRequestInterceptor();
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_NET_INIT_NATIVE_CALLBACK_H_