Oilpan: Prepare to support garbage-collected Node in WebNode hierarchy.

Source/web/tests/WebPageNewSerializerTest.cpp

 /*
  * Copyright (C) 2011 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 184 matching lines @@
     registerMockedURLLoad(toKURL("http://www.test.com/iframe.html"), WebString::fromUTF8("iframe.html"), WebString::fromUTF8("pageserializer/"), htmlMimeType());
     registerMockedURLLoad(toKURL("http://www.test.com/iframe2.html"), WebString::fromUTF8("iframe2.html"), WebString::fromUTF8("pageserializer/"), htmlMimeType());
     registerMockedURLLoad(toKURL("http://www.test.com/red_background.png"), WebString::fromUTF8("red_background.png"), WebString::fromUTF8("pageserializer/"), pngMimeType());
     registerMockedURLLoad(toKURL("http://www.test.com/green_background.png"), WebString::fromUTF8("green_background.png"), WebString::fromUTF8("pageserializer/"), pngMimeType());
     registerMockedURLLoad(toKURL("http://www.test.com/blue_background.png"), WebString::fromUTF8("blue_background.png"), WebString::fromUTF8("pageserializer/"), pngMimeType());
 
     loadURLInTopFrame(topFrameURL);
     // OBJECT/EMBED have some delay to start to load their content. The first
     // serveAsynchronousMockedRequests call in loadURLInTopFrame() finishes
     // before the start.
-    RefPtr<Document> document = static_cast<PassRefPtr<Document> >(webView()->mainFrame()->document());
+    RefPtrWillBeRawPtr<Document> document = static_cast<PassRefPtrWillBeRawPtr<Document> >(webView()->mainFrame()->document());
     document->updateLayoutIgnorePendingStylesheets(Document::RunPostLayoutTasksSynchronously);
     Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
 
     WebVector<WebPageSerializer::Resource> resources;
     WebPageSerializer::serialize(webView(), &resources);
     ASSERT_FALSE(resources.isEmpty());
 
     // The first resource should be the main-frame.
     const WebPageSerializer::Resource& resource = resources[0];
     EXPECT_TRUE(resource.url == WebURL(toKURL("http://www.test.com")));
@@ skipping 237 matching lines @@
     // exactly two times.
     size_t nbDataURLs = 0;
     LineReader lineReader(std::string(mhtmlData.data()));
     std::string line;
     while (lineReader.getNextLine(&line)) {
         if (line.find("data:text") != std::string::npos)
             nbDataURLs++;
     }
     EXPECT_EQ(2u, nbDataURLs);
 }