Revert of Fix webkit_unit_tests to use the threaded parser and enable everywhere.

Source/web/tests/PinchViewportTest.cpp

Index: Source/web/tests/PinchViewportTest.cpp
diff --git a/Source/web/tests/PinchViewportTest.cpp b/Source/web/tests/PinchViewportTest.cpp
index ffda5797c89adee273ca35f405715e8b0bc2b491..1558189c45f76218f83d38ab29b4df61c2e26e31 100644
--- a/Source/web/tests/PinchViewportTest.cpp
+++ b/Source/web/tests/PinchViewportTest.cpp
@@ -52,6 +52,7 @@
 
 using namespace WebCore;
 using namespace blink;
+using blink::FrameTestHelpers::runPendingTasks;
 
 namespace {
 
@@ -82,6 +83,7 @@
     void navigateTo(const std::string& url)
     {
         FrameTestHelpers::loadFrame(webViewImpl()->mainFrame(), url);
+        Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
     }
 
     void forceFullCompositingUpdate()
@@ -92,6 +94,12 @@
     void registerMockedHttpURLLoad(const std::string& fileName)
     {
         URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8(fileName.c_str()));
+    }
+
+    void executeScript(const WebString& code)
+    {
+        webViewImpl()->mainFrame()->executeScript(WebScriptSource(code));
+        runPendingTasks();
     }
 
     WebLayer* getRootScrollLayer()