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

third_party/WebKit/Source/web/tests/DeferredLoadingTest.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/exported/WebViewBase.h"
 #include "platform/testing/HistogramTester.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "web/WebLocalFrameImpl.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 {
 
 static const char kHistogramName[] =
     "Navigation.DeferredDocumentLoading.StatesV4";
 
 class DeferredLoadingTest : public SimTest {
  protected:
-  DeferredLoadingTest() { WebView().Resize(WebSize(640, 480)); }
+  DeferredLoadingTest() {}
+
+  void SetUp() override {
+    SimTest::SetUp();
+    WebView().Resize(WebSize(640, 480));
+  }
   void CompositeFrame() {
     while (Compositor().NeedsBeginFrame()) {
       Compositor().BeginFrame();
       testing::RunPendingTasks();
     }
   }
 
   std::unique_ptr<SimRequest> CreateMainResource() {
     std::unique_ptr<SimRequest> main_resource =
         WTF::WrapUnique(new SimRequest("https://example.com/", "text/html"));
@@ skipping 459 matching lines @@
 
   ExpectCount(WouldLoadReason::kCreated, 1);
   ExpectCount(WouldLoadReason::kVisible, 1);
   ExpectCount(WouldLoadReason::k1ScreenAway, 1);
   ExpectCount(WouldLoadReason::k2ScreensAway, 1);
   ExpectCount(WouldLoadReason::k3ScreensAway, 1);
   ExpectTotalCount(5);
 }
 
 }  // namespace blink