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

components/test_runner/mock_web_midi_accessor.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_MIDI_ACCESSOR_H_
 #define COMPONENTS_TEST_RUNNER_MOCK_WEB_MIDI_ACCESSOR_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
-#include "components/test_runner/web_task.h"
+#include "base/memory/weak_ptr.h"
 #include "third_party/WebKit/public/platform/modules/webmidi/WebMIDIAccessor.h"
 
 namespace blink {
 class WebMIDIAccessorClient;
 }
 
 namespace test_runner {
 
 class TestInterfaces;
 
 class MockWebMIDIAccessor : public blink::WebMIDIAccessor {
  public:
   explicit MockWebMIDIAccessor(blink::WebMIDIAccessorClient* client,
                                TestInterfaces* interfaces);
   ~MockWebMIDIAccessor() override;
 
   // blink::WebMIDIAccessor implementation.
   void startSession() override;
   void sendMIDIData(unsigned port_index,
                     const unsigned char* data,
                     size_t length,
                     double timestamp) override;
 
-  // WebTask related methods
-  WebTaskList* mutable_task_list() { return &task_list_; }
+ private:
+  void ReportStartedSession(bool success);
 
- private:
   blink::WebMIDIAccessorClient* client_;
-  WebTaskList task_list_;
   TestInterfaces* interfaces_;
 
+  base::WeakPtrFactory<MockWebMIDIAccessor> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(MockWebMIDIAccessor);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_MOCK_WEB_MIDI_ACCESSOR_H_