Use ScopedTaskEnvironment instead of MessageLoopForUI in content tests.

content/browser/renderer_host/input/gesture_event_queue_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/browser/renderer_host/input/gesture_event_queue.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/test/scoped_feature_list.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "content/common/input/synthetic_web_input_event_builders.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "ui/events/blink/blink_features.h"
 
 using base::TimeDelta;
 using blink::WebGestureDevice;
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 
 namespace content {
 
 class GestureEventQueueTest : public testing::Test,
                               public GestureEventQueueClient,
                               public TouchpadTapSuppressionControllerClient {
  public:
   GestureEventQueueTest() : GestureEventQueueTest(false) {}
 
   GestureEventQueueTest(bool enable_compositor_event_queue)
-      : acked_gesture_event_count_(0), sent_gesture_event_count_(0) {
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI),
+        acked_gesture_event_count_(0),
+        sent_gesture_event_count_(0) {
     if (enable_compositor_event_queue)
       feature_list_.InitAndEnableFeature(features::kVsyncAlignedInputEvents);
     else
       feature_list_.InitAndDisableFeature(features::kVsyncAlignedInputEvents);
   }
 
   ~GestureEventQueueTest() override {}
 
   // testing::Test
   void SetUp() override {
@@ skipping 135 matching lines @@
 
   bool WillIgnoreNextACK() {
     return queue()->ignore_next_ack_;
   }
 
   GestureEventQueue* queue() const {
     return queue_.get();
   }
 
  private:
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<GestureEventQueue> queue_;
   size_t acked_gesture_event_count_;
   size_t sent_gesture_event_count_;
   WebGestureEvent last_acked_event_;
   std::unique_ptr<InputEventAckState> sync_ack_result_;
   std::unique_ptr<WebGestureEvent> sync_followup_event_;
-  base::MessageLoopForUI message_loop_;
   base::test::ScopedFeatureList feature_list_;
 };
 
 #if GTEST_HAS_PARAM_TEST
 // This is for tests that are to be run for all source devices.
 class GestureEventQueueWithSourceTest
     : public GestureEventQueueTest,
       public testing::WithParamInterface<WebGestureDevice> {};
 #endif  // GTEST_HAS_PARAM_TEST
 
@@ skipping 1019 matching lines @@
   SendInputEventACK(WebInputEvent::kGesturePinchUpdate,
                     INPUT_EVENT_ACK_STATE_CONSUMED);
   SendInputEventACK(WebInputEvent::kGesturePinchUpdate,
                     INPUT_EVENT_ACK_STATE_CONSUMED);
   EXPECT_EQ(WebInputEvent::kGesturePinchUpdate, last_acked_event().GetType());
   EXPECT_EQ(0U, GestureEventQueueSize());
   EXPECT_EQ(0U, GetAndResetSentGestureEventCount());
 }
 
 }  // namespace content