Fix webkit_unit_tests to use the threaded parser and enable everywhere.

Source/web/tests/WebPageSerializerTest.cpp

Index: Source/web/tests/WebPageSerializerTest.cpp
diff --git a/Source/web/tests/WebPageSerializerTest.cpp b/Source/web/tests/WebPageSerializerTest.cpp
index e5014ccadf689e9d92f5f0aa6d79d239151df57a..2e10985cde772baa78288a52611d0123a69fb339 100644
--- a/Source/web/tests/WebPageSerializerTest.cpp
+++ b/Source/web/tests/WebPageSerializerTest.cpp
@@ -79,12 +79,7 @@ protected:
 
     void loadURLInTopFrame(const WebURL& url)
     {
-        WebURLRequest urlRequest;
-        urlRequest.initialize();
-        urlRequest.setURL(url);
-        m_helper.webView()->mainFrame()->loadRequest(urlRequest);
-        // Make sure any pending request get served.
-        Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
+        FrameTestHelpers::loadFrame(m_helper.webView()->mainFrame(), url.string().utf8());
     }
 
     static bool webVectorContains(const WebVector<WebURL>& vector, const char* url)
@@ -160,12 +155,6 @@ TEST_F(WebPageSerializerTest, MultipleFrames)
                           WebString::fromUTF8("awesome.png"));
 
     loadURLInTopFrame(topFrameURL);
-    // OBJECT/EMBED have some delay to start to load their content. The first
-    // serveAsynchronousMockedRequests call in loadURLInTopFrame() finishes
-    // before the start.
-    RefPtrWillBeRawPtr<Document> document = static_cast<PassRefPtrWillBeRawPtr<Document> >(webView()->mainFrame()->document());
-    document->updateLayoutIgnorePendingStylesheets(Document::RunPostLayoutTasksSynchronously);
-    Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
 
     // Retrieve all resources.
     WebVector<WebURL> frames;