Cleanup: Start using toFoo methods as part of newly adopted coding guideline.

Source/web/tests/WebViewTest.cpp

 /*
  * Copyright (C) 2011, 2012 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 252 matching lines @@
 TEST_F(WebViewTest, FocusIsInactive)
 {
     URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), "visible_iframe.html");
     WebView* webView = FrameTestHelpers::createWebViewAndLoad(m_baseURL + "visible_iframe.html");
 
     webView->setFocus(true);
     webView->setIsActive(true);
     WebFrameImpl* frame = toWebFrameImpl(webView->mainFrame());
     EXPECT_TRUE(frame->frame()->document()->isHTMLDocument());
 
-    WebCore::HTMLDocument* document = static_cast<WebCore::HTMLDocument*>(frame->frame()->document());
+    WebCore::HTMLDocument* document = WebCore::toHTMLDocument(frame->frame()->document());
     EXPECT_TRUE(document->hasFocus());
     webView->setFocus(false);
     webView->setIsActive(false);
     EXPECT_FALSE(document->hasFocus());
     webView->setFocus(true);
     webView->setIsActive(true);
     EXPECT_TRUE(document->hasFocus());
     webView->setFocus(true);
     webView->setIsActive(false);
     EXPECT_FALSE(document->hasFocus());
@@ skipping 987 matching lines @@
     webURLRequestWithTargetStart.initialize();
     WebCore::FrameLoadRequest requestWithTargetStart(0, webURLRequestWithTargetStart.toResourceRequest(), WTF::String("_start"));
     toWebViewImpl(client.createdWebView())->page()->mainFrame()->loader()->load(requestWithTargetStart);
     EXPECT_TRUE(client.didFocusCalled());
 
     client.close();
     webViewImpl->close();
 }
 
 }