Set overflow: auto in StyleResolver::styleForDocument.

third_party/WebKit/Source/web/tests/sim/SimTest.cpp

 // Copyright 2015 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 "web/tests/sim/SimTest.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/scroll/ScrollbarTheme.h"
@@ skipping 43 matching lines @@
 }
 
 Document& SimTest::document() {
   return *webView().mainFrameImpl()->frame()->document();
 }
 
 WebViewImpl& SimTest::webView() {
   return *m_webViewHelper.webView();
 }
 
+WebLocalFrameImpl& SimTest::mainFrame() {
+  return *webView().mainFrameImpl();
+}
+
 const SimWebViewClient& SimTest::webViewClient() const {
   return m_webViewClient;
 }
 
 SimCompositor& SimTest::compositor() {
   return m_compositor;
 }
 
 }  // namespace blink