Remove the forceCompositingMode setting.

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 138 matching lines @@
         OwnPtrWillBeRawPtr<WebCore::RuleSet> ruleSet = WebCore::RuleSet::create();
         ruleSet->addRulesFromSheet(styleSheet.get(), WebCore::MediaQueryEvaluator("screen"));
 
         Document* document = webViewHelper->webViewImpl()->page()->mainFrame()->document();
         document->ensureStyleResolver().viewportStyleResolver()->collectViewportRules(ruleSet.get(), WebCore::ViewportStyleResolver::UserAgentOrigin);
         document->ensureStyleResolver().viewportStyleResolver()->resolve();
     }
 
     static void configueCompositingWebView(WebSettings* settings)
     {
-        settings->setForceCompositingMode(true);
         settings->setAcceleratedCompositingEnabled(true);
         settings->setAcceleratedCompositingForFixedPositionEnabled(true);
         settings->setAcceleratedCompositingForOverflowScrollEnabled(true);
         settings->setCompositedScrollingForFramesEnabled(true);
     }
 
     void initializeTextSelectionWebView(const std::string& url, FrameTestHelpers::WebViewHelper* webViewHelper)
     {
         webViewHelper->initializeAndLoad(url, true);
         webViewHelper->webView()->settings()->setDefaultFontSize(12);
@@ skipping 5250 matching lines @@
     registerMockedHttpURLLoad("link-manifest-change.html");
 
     ManifestChangeWebFrameClient webFrameClient;
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "link-manifest-change.html", true, &webFrameClient);
 
     EXPECT_EQ(14, webFrameClient.manifestChangeCount());
 }
 
 } // namespace