Add MediaControlsImplTestWithMockScheduler.

third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp

Index: third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp
diff --git a/third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp b/third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp
index 2c0729d20329dd4e57d0089e1c257bf9e5e66fee..f194dc69e1a2e52f9c9ba0efe042a83d1a333531 100644
--- a/third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp
+++ b/third_party/WebKit/Source/modules/media_controls/MediaControlsImplTest.cpp
@@ -791,15 +791,25 @@ TEST_F(MediaControlsImplTest, MAYBE_TimelineMetricsDragBackAndForth) {
       "Media.Timeline.DragTimeDelta.128_255", 9 /* (-4m, -2m] */, 1);
 }
 
-TEST_F(MediaControlsImplTest, ControlsRemainVisibleDuringKeyboardInteraction) {
+namespace {
+
+class MediaControlsImplTestWithMockScheduler : public MediaControlsImplTest {
+ protected:
+  void SetUp() override {
+    // DocumentParserTiming has DCHECKS to make sure time > 0.0.
+    platform_->AdvanceClockSeconds(1);
+
+    MediaControlsImplTest::SetUp();
+  }
+
   ScopedTestingPlatformSupport<TestingPlatformSupportWithMockScheduler>
-      platform;
+      platform_;
+};
 
-  // DocumentParserTiming has DCHECKS to make sure time > 0.0.
-  platform->AdvanceClockSeconds(1);
+}  // namespace
 
-  // Need to reinitialize page since we changed the platform.
-  InitializePage();
+TEST_F(MediaControlsImplTestWithMockScheduler,
+       ControlsRemainVisibleDuringKeyboardInteraction) {
   EnsureSizing();
 
   Element* panel = MediaControls().PanelElement();
@@ -813,23 +823,23 @@ TEST_F(MediaControlsImplTest, ControlsRemainVisibleDuringKeyboardInteraction) {
   EXPECT_TRUE(IsElementVisible(*panel));
 
   // Tabbing between controls prevents controls from hiding.
-  platform->RunForPeriodSeconds(2);
+  platform_->RunForPeriodSeconds(2);
   MediaControls().DispatchEvent(Event::Create("focusin"));
-  platform->RunForPeriodSeconds(2);
+  platform_->RunForPeriodSeconds(2);
   EXPECT_TRUE(IsElementVisible(*panel));
 
   // Seeking on the timeline or volume bar prevents controls from hiding.
   MediaControls().DispatchEvent(Event::Create("input"));
-  platform->RunForPeriodSeconds(2);
+  platform_->RunForPeriodSeconds(2);
   EXPECT_TRUE(IsElementVisible(*panel));
 
   // Pressing a key prevents controls from hiding.
   MediaControls().PanelElement()->DispatchEvent(Event::Create("keypress"));
-  platform->RunForPeriodSeconds(2);
+  platform_->RunForPeriodSeconds(2);
   EXPECT_TRUE(IsElementVisible(*panel));
 
   // Once user interaction stops, controls can hide.
-  platform->RunForPeriodSeconds(2);
+  platform_->RunForPeriodSeconds(2);
   EXPECT_FALSE(IsElementVisible(*panel));
 }