Replacing most of web_task.h with base::Closure + base::WeakPtrFactory.

components/test_runner/mock_web_user_media_client.h

 // Copyright 2014 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 COMPONENTS_TEST_RUNNER_MOCK_WEB_USER_MEDIA_CLIENT_H_
 #define COMPONENTS_TEST_RUNNER_MOCK_WEB_USER_MEDIA_CLIENT_H_
 
 #include "base/macros.h"
-#include "components/test_runner/web_task.h"
+#include "base/memory/weak_ptr.h"
 #include "third_party/WebKit/public/web/WebUserMediaClient.h"
 
 namespace test_runner {
 
 class WebTestDelegate;
 
 class MockWebUserMediaClient : public blink::WebUserMediaClient {
  public:
   explicit MockWebUserMediaClient(WebTestDelegate* delegate);
-  ~MockWebUserMediaClient() override {}
+  ~MockWebUserMediaClient() override;
 
   void requestUserMedia(const blink::WebUserMediaRequest&) override;
   void cancelUserMediaRequest(const blink::WebUserMediaRequest&) override;
   void requestMediaDevices(const blink::WebMediaDevicesRequest&) override;
   void cancelMediaDevicesRequest(const blink::WebMediaDevicesRequest&) override;
   void requestSources(const blink::WebMediaStreamTrackSourcesRequest&) override;
 
-  // Task related methods
-  WebTaskList* mutable_task_list() { return &task_list_; }
+ private:
+  WebTestDelegate* delegate_;
 
- private:
-  WebTaskList task_list_;
-  WebTestDelegate* delegate_;
+  base::WeakPtrFactory<MockWebUserMediaClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MockWebUserMediaClient);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_MOCK_WEB_USER_MEDIA_CLIENT_H_