0 -> nullptr for UseCounter pointer in CSSParserContext.

third_party/WebKit/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 204 matching lines @@
         URLTestHelpers::registerMockedURLLoadWithCustomResponse(toKURL(fullString.c_str()), WebString::fromUTF8(fileName.c_str()), WebString::fromUTF8(""), response);
     }
 
     void registerMockedHttpURLLoadWithMimeType(const std::string& fileName, const std::string& mimeType)
     {
         URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8(fileName.c_str()), WebString::fromUTF8(mimeType));
     }
 
     void applyViewportStyleOverride(FrameTestHelpers::WebViewHelper* webViewHelper)
     {
-        StyleSheetContents* styleSheet = StyleSheetContents::create(CSSParserContext(UASheetMode, 0));
+        StyleSheetContents* styleSheet = StyleSheetContents::create(CSSParserContext(UASheetMode, nullptr));
         styleSheet->parseString(loadResourceAsASCIIString("viewportAndroid.css"));
         RuleSet* ruleSet = RuleSet::create();
         ruleSet->addRulesFromSheet(styleSheet, MediaQueryEvaluator("screen"));
 
         Document* document = toLocalFrame(webViewHelper->webViewImpl()->page()->mainFrame())->document();
         document->ensureStyleResolver().viewportStyleResolver()->collectViewportRules(ruleSet, ViewportStyleResolver::UserAgentOrigin);
         document->ensureStyleResolver().viewportStyleResolver()->resolve();
     }
 
     static void configueCompositingWebView(WebSettings* settings)
@@ skipping 8576 matching lines @@
     request.setURL(toKURL("javascript:location='" + redirectURL + "'"));
     helper.webViewImpl()->mainFrame()->toWebLocalFrame()->loadRequest(request);
 
     // Normally, the result of the JS url replaces the existing contents on the
     // Document. However, if the JS triggers a navigation, the contents should
     // not be replaced.
     EXPECT_EQ("", toLocalFrame(helper.webViewImpl()->page()->mainFrame())->document()->documentElement()->innerText());
 }
 
 } // namespace blink