Use ScopedTaskEnvironment instead of MessageLoopForUI in content tests.

content/renderer/media/media_stream_video_capturer_source_unittest.cc

 // 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.
 
 #include "content/renderer/media/media_stream_video_capturer_source.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/scoped_feature_list.h"
+#include "base/test/scoped_task_environment.h"
 #include "content/child/child_process.h"
 #include "content/public/common/content_features.h"
 #include "content/public/renderer/media_stream_video_sink.h"
 #include "content/renderer/media/media_stream_video_track.h"
 #include "content/renderer/media/mock_constraint_factory.h"
 #include "content/renderer/media/video_track_adapter.h"
 #include "media/base/bind_to_current_loop.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebHeap.h"
@@ skipping 71 matching lines @@
   base::TimeTicks* const capture_time_;
   media::VideoFrameMetadata* const metadata_;
   base::Closure got_frame_cb_;
 };
 
 }  // namespace
 
 class MediaStreamVideoCapturerSourceTest : public testing::Test {
  public:
   MediaStreamVideoCapturerSourceTest()
-      : child_process_(new ChildProcess()),
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI),
+        child_process_(new ChildProcess()),
         source_(nullptr),
         delegate_(nullptr),
         source_stopped_(false) {
     scoped_feature_list_.InitAndDisableFeature(
         features::kMediaStreamOldVideoConstraints);
   }
 
   void TearDown() override {
     webkit_source_.Reset();
     blink::WebHeap::CollectAllGarbageForTesting();
@@ skipping 56 matching lines @@
   }
   void OnStarted(bool result) { source_->OnRunStateChanged(result); }
 
  protected:
   void OnConstraintsApplied(MediaStreamSource* source,
                             MediaStreamRequestResult result,
                             const blink::WebString& result_name) {}
 
   // A ChildProcess and a MessageLoopForUI are both needed to fool the Tracks
   // and Sources below into believing they are on the right threads.
-  base::MessageLoopForUI message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<ChildProcess> child_process_;
 
   blink::WebMediaStreamSource webkit_source_;
   MediaStreamVideoCapturerSource* source_;  // owned by |webkit_source_|.
   MockVideoCapturerSource* delegate_;     // owned by |source|.
   blink::WebString webkit_source_id_;
   bool source_stopped_;
   MockConstraintFactory constraint_factory_;
   base::test::ScopedFeatureList scoped_feature_list_;
 };
@@ skipping 85 matching lines @@
   EXPECT_EQ(reference_capture_time, capture_time);
   double metadata_value;
   EXPECT_TRUE(metadata.GetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                  &metadata_value));
   EXPECT_EQ(30.0, metadata_value);
 }
 
 class MediaStreamVideoCapturerSourceOldConstraintsTest : public testing::Test {
  public:
   MediaStreamVideoCapturerSourceOldConstraintsTest()
-      : child_process_(new ChildProcess()),
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI),
+        child_process_(new ChildProcess()),
         source_(nullptr),
         delegate_(nullptr),
         source_stopped_(false) {
     scoped_feature_list_.InitAndEnableFeature(
         features::kMediaStreamOldVideoConstraints);
   }
 
   void TearDown() override {
     webkit_source_.Reset();
     blink::WebHeap::CollectAllGarbageForTesting();
@@ skipping 59 matching lines @@
   }
   void OnStarted(bool result) { source_->OnRunStateChanged(result); }
 
  protected:
   void OnConstraintsApplied(MediaStreamSource* source,
                             MediaStreamRequestResult result,
                             const blink::WebString& result_name) {}
 
   // A ChildProcess and a MessageLoopForUI are both needed to fool the Tracks
   // and Sources below into believing they are on the right threads.
-  base::MessageLoopForUI message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<ChildProcess> child_process_;
 
   blink::WebMediaStreamSource webkit_source_;
   MediaStreamVideoCapturerSource* source_;  // owned by |webkit_source_|.
   MockVideoCapturerSource* delegate_;       // owned by |source|.
   blink::WebString webkit_source_id_;
   bool source_stopped_;
   MockConstraintFactory constraint_factory_;
   base::test::ScopedFeatureList scoped_feature_list_;
 };
@@ skipping 230 matching lines @@
   run_loop.Run();
   fake_sink.DisconnectFromTrack();
   EXPECT_EQ(reference_capture_time, capture_time);
   double metadata_value;
   EXPECT_TRUE(metadata.GetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                  &metadata_value));
   EXPECT_EQ(30.0, metadata_value);
 }
 
 }  // namespace content