Remove unused MockAudioDeviceFactory class

This is phase 4 on the design document [1].

[1] https://docs.google.com/document/d/19Zk6Fv1E-6QTQ2c33rpBjDNEkzlsSKvjb3hWkvZAE80/

BUG=787252
R=guidou@chromium.org, haraken@chromium.org

Change-Id: If7d88ea6be23d46dd78a9c9bbdc564762ae86a80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2435922Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Antonio Gomes (GMT-4) <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#811342}

content/renderer/media/audio/mock_audio_device_factory.cc

-// Copyright 2016 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.
-
-#include "content/renderer/media/audio/mock_audio_device_factory.h"
-
-namespace content {
-
-MockCapturerSource::MockCapturerSource() {}
-
-MockCapturerSource::~MockCapturerSource() {}
-
-void MockCapturerSource::SetVolume(double volume) {}
-
-void MockCapturerSource::SetOutputDeviceForAec(
-    const std::string& output_device_id) {}
-
-MockAudioDeviceFactory::MockAudioDeviceFactory()
-    : mock_capturer_source_(new MockCapturerSource()),
-      did_create_once_(false) {}
-
-MockAudioDeviceFactory::~MockAudioDeviceFactory() {}
-
-scoped_refptr<media::AudioCapturerSource>
-MockAudioDeviceFactory::CreateAudioCapturerSource(
-    const blink::LocalFrameToken& frame_token,
-    const media::AudioSourceParameters& params) {
-  CHECK(!did_create_once_);
-  did_create_once_ = true;
-  return scoped_refptr<media::AudioCapturerSource>(mock_capturer_source_);
-}
-
-}  // namespace content

content/renderer/media/audio/mock_audio_device_factory.h

-// Copyright 2016 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 CONTENT_RENDERER_MEDIA_AUDIO_MOCK_AUDIO_DEVICE_FACTORY_H_
-#define CONTENT_RENDERER_MEDIA_AUDIO_MOCK_AUDIO_DEVICE_FACTORY_H_
-
-#include <string>
-
-#include "media/base/audio_capturer_source.h"
-#include "media/base/audio_renderer_sink.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "third_party/blink/public/common/tokens/tokens.h"
-#include "third_party/blink/public/web/modules/media/audio/web_audio_device_factory.h"
-
-namespace content {
-
-// MockAudioDeviceFactory creates an instance of this.
-class MockCapturerSource : public media::AudioCapturerSource {
- public:
-  MockCapturerSource();
-  MOCK_METHOD2(Initialize,
-               void(const media::AudioParameters& params,
-                    CaptureCallback* callback));
-  MOCK_METHOD0(Start, void());
-  MOCK_METHOD0(Stop, void());
-  MOCK_METHOD1(SetAutomaticGainControl, void(bool enable));
-  void SetVolume(double volume) override;
-  void SetOutputDeviceForAec(const std::string& output_device_id) override;
-
- protected:
-  ~MockCapturerSource() override;
-};
-
-// Creates one MockCapturerSource instance for unit testing. This replaces the
-// need for unit tests to open a real platform audio output. Instantiating this
-// class sets the global content::AudioDeviceFactory implementation to |this|.
-class MockAudioDeviceFactory : public blink::WebAudioDeviceFactory {
- public:
-  MockAudioDeviceFactory();
-  ~MockAudioDeviceFactory() override;
-
-  // Returns the MockCapturerSource created by this factory.
-  const scoped_refptr<MockCapturerSource>& mock_capturer_source() const {
-    return mock_capturer_source_;
-  }
-
-  // These methods are just mocked because tests currently don't need them to be
-  // implemented.
-  MOCK_METHOD3(CreateFinalAudioRendererSink,
-               scoped_refptr<media::AudioRendererSink>(
-                   const blink::LocalFrameToken& frame_token,
-                   const media::AudioSinkParameters& params,
-                   base::TimeDelta auth_timeout));
-  MOCK_METHOD3(CreateAudioRendererSink,
-               scoped_refptr<media::AudioRendererSink>(
-                   blink::WebAudioDeviceSourceType source_type,
-                   const blink::LocalFrameToken& frame_token,
-                   const media::AudioSinkParameters& params));
-  MOCK_METHOD3(CreateSwitchableAudioRendererSink,
-               scoped_refptr<media::SwitchableAudioRendererSink>(
-                   blink::WebAudioDeviceSourceType source_type,
-                   const blink::LocalFrameToken& frame_token,
-                   const media::AudioSinkParameters& params));
-
-  // Returns mock_capturer_source_ once. If called a second time, the process
-  // will crash.
-  scoped_refptr<media::AudioCapturerSource> CreateAudioCapturerSource(
-      const blink::LocalFrameToken& frame_token,
-      const media::AudioSourceParameters& params) override;
-
- private:
-  scoped_refptr<MockCapturerSource> mock_capturer_source_;
-  bool did_create_once_;
-
-  DISALLOW_COPY_AND_ASSIGN(MockAudioDeviceFactory);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_MEDIA_AUDIO_MOCK_AUDIO_DEVICE_FACTORY_H_

content/test/BUILD.gn

@@ -2057,8 +2057,6 @@ test("content_unittests") {
     "../renderer/loader/test_request_peer.h",
     "../renderer/loader/url_loader_client_impl_unittest.cc",
     "../renderer/loader/web_url_loader_impl_unittest.cc",
-    "../renderer/media/audio/mock_audio_device_factory.cc",
-    "../renderer/media/audio/mock_audio_device_factory.h",
     "../renderer/media/batching_media_log_unittest.cc",
     "../renderer/media/inspector_media_event_handler_unittest.cc",
     "../renderer/media/power_status_helper_impl_unittest.cc",