Use ScopedTaskEnvironment instead of MessageLoopForUI in ui tests.

ui/events/gesture_detection/filtered_gesture_provider_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 "base/message_loop/message_loop.h"
+#include "ui/events/gesture_detection/filtered_gesture_provider.h"

[sadrul, 2017/04/28 15:36:03]

newline after

+#include "base/test/scoped_task_environment.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "ui/events/gesture_detection/filtered_gesture_provider.h"
 #include "ui/events/test/motion_event_test_utils.h"
 
 namespace ui {
 
 class FilteredGestureProviderTest : public GestureProviderClient,
                                     public testing::Test {
  public:
-  FilteredGestureProviderTest() {}
+  FilteredGestureProviderTest()
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
   ~FilteredGestureProviderTest() override {}
 
   // GestureProviderClient implementation.
   void OnGestureEvent(const GestureEventData&) override {}
 
  private:
-  base::MessageLoopForUI message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
 };
 
 // Single touch drag test: After touch-start, the moved_beyond_slop_region bit
 // should stay unset as long as the touch movement is confined to the slop
 // region. Once the touch moves beyond the slop region, the bit should remain
 // set until (incl) touch-end.
 TEST_F(FilteredGestureProviderTest, TouchMovedBeyondSlopRegion_SingleTouch) {
   GestureProvider::Config config;
   FilteredGestureProvider provider(config, this);
 
@@ skipping 112 matching lines @@
 
   for(int i = 0; i < 3; i++) {
     event.ReleasePoint();
     result = provider.OnTouchEvent(event);
     EXPECT_TRUE(result.succeeded);
     EXPECT_TRUE(result.moved_beyond_slop_region);
   }
 }
 
 }  // namespace ui