Componentize IgnoreNavigationResourceThrottle and add chrome and webview specific implementations.

chrome/browser/renderer_host/intercept_navigation_resource_throttle.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_INTERCEPT_NAVIGATION_RESOURCE_THROTTLE_H_
-#define CHROME_BROWSER_RENDERER_HOST_INTERCEPT_NAVIGATION_RESOURCE_THROTTLE_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/resource_throttle.h"
-
-class GURL;
-
-namespace content {
-class RenderViewHost;
-struct Referrer;
-}
-
-namespace net {
-class URLRequest;
-}
-
-// This class allows the provider of the Callback to selectively ignore top
-// level navigations.
-class InterceptNavigationResourceThrottle : public content::ResourceThrottle {
- public:
-  typedef base::Callback<bool(content::RenderViewHost* /* source */,
-                              const GURL& /*url*/,
-                              const content::Referrer& /*referrer*/,
-                              bool /*is_content_initiated*/)>
-      CheckOnUIThreadCallback;
-
-  InterceptNavigationResourceThrottle(
-      net::URLRequest* request,
-      CheckOnUIThreadCallback should_ignore_callback);
-  virtual ~InterceptNavigationResourceThrottle();
-
-  // content::ResourceThrottle implementation:
-  virtual void WillStartRequest(bool* defer) OVERRIDE;
-  virtual void WillRedirectRequest(const GURL& new_url, bool* defer) OVERRIDE;
-
- private:
-  bool CheckIfShouldIgnoreNavigation(const GURL& url);
-  void OnResultObtained(bool should_ignore_navigation);
-
-  net::URLRequest* request_;
-  CheckOnUIThreadCallback should_ignore_callback_;
-  base::WeakPtrFactory<InterceptNavigationResourceThrottle> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(InterceptNavigationResourceThrottle);
-};
-
-#endif  // CHROME_BROWSER_RENDERER_HOST_INTERCEPT_NAVIGATION_RESOURCE_THROTTLE_H_