Make the embedder responsible for creating the WebFrame

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 924b755016e4b14e09a637da2173bb83e1d7cd8a..ee1ad6baf156f98ba8606aa2057122df860fe548 100644
--- a/Source/web/tests/WebPageSerializerTest.cpp
+++ b/Source/web/tests/WebPageSerializerTest.cpp
@@ -66,13 +66,15 @@ protected:
     {
         // Create and initialize the WebView.
         m_webView = WebView::create(0);
-        m_webView->initializeMainFrame(&m_webFrameClient);
+        m_mainFrame = WebFrame::create(&m_webFrameClient);
+        m_webView->initializeMainFrame(m_mainFrame);
     }
 
     virtual void TearDown()
     {
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
         m_webView->close();
+        m_mainFrame->close();
     }
 
     void registerMockedURLLoad(const std::string& url, const WebString& fileName)
@@ -107,6 +109,7 @@ protected:
 
 private:
     TestWebFrameClient m_webFrameClient;
+    WebFrame* m_mainFrame;
 };
 
 TEST_F(WebPageSerializerTest, HTMLNodes)