[scheduler] Fix --disable-background-timer-throttling flag.

third_party/WebKit/Source/web/tests/MediaElementFillingViewportTest.cpp

 // 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 "core/dom/Document.h"
 #include "core/html/HTMLMediaElement.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "web/tests/sim/SimCompositor.h"
 #include "web/tests/sim/SimDisplayItemList.h"
 #include "web/tests/sim/SimRequest.h"
 #include "web/tests/sim/SimTest.h"
 
 namespace blink {
 
 class MediaElementFillingViewportTest : public SimTest {
  protected:
-  MediaElementFillingViewportTest() { WebView().Resize(WebSize(640, 480)); }
+  MediaElementFillingViewportTest() {}
+
+  void SetUp() override {
+    SimTest::SetUp();
+    WebView().Resize(WebSize(640, 480));
+  }
 
   bool IsMostlyFillingViewport(HTMLMediaElement* element) {
     return element->mostly_filling_viewport_;
   }
 
   bool ViewportFillDebouncerTimerActive(HTMLMediaElement* element) {
     return element->viewport_fill_debouncer_timer_.IsActive();
   }
 
   void CheckViewportIntersectionChanged(HTMLMediaElement* element) {
@@ skipping 118 matching lines @@
   element->setAttribute(
       "style", "position:fixed; left:0; top:240px; width:100%; height:100%;",
       ASSERT_NO_EXCEPTION);
   Compositor().BeginFrame();
   CheckViewportIntersectionChanged(element);
   EXPECT_FALSE(IsMostlyFillingViewport(element));
   EXPECT_FALSE(ViewportFillDebouncerTimerActive(element));
 }
 
 }  // namespace blink