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

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

 // Copyright 2017 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/HTMLLinkElement.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "web/tests/sim/SimRequest.h"
 #include "web/tests/sim/SimTest.h"
 
 namespace blink {
 
 class HTMLImportSheetsTest : public SimTest {
  protected:
-  HTMLImportSheetsTest() { WebView().Resize(WebSize(640, 480)); }
+  HTMLImportSheetsTest() {}
+
+  void SetUp() override {
+    SimTest::SetUp();
+    WebView().Resize(WebSize(640, 480));
+  }
 };
 
 TEST_F(HTMLImportSheetsTest, NeedsActiveStyleUpdate) {
   SimRequest main_resource("https://example.com/", "text/html");
   SimRequest import_resource("https://example.com/import.html", "text/html");
 
   LoadURL("https://example.com/");
   main_resource.Complete("<link id=link rel=import href=import.html>");
   import_resource.Complete("<style>div{}</style>");
 
@@ skipping 23 matching lines @@
   ASSERT_TRUE(import_doc);
   EXPECT_TRUE(import_doc->GetStyleEngine().NeedsActiveStyleUpdate());
 
   import_doc->GetStyleEngine().StyleSheetsForStyleSheetList(*import_doc);
 
   EXPECT_TRUE(GetDocument().GetStyleEngine().NeedsActiveStyleUpdate());
   EXPECT_FALSE(import_doc->GetStyleEngine().NeedsActiveStyleUpdate());
 }
 
 }  // namespace blink