Make the embedder responsible for creating the WebFrame

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index a547faa892b2efc528a7301c19e1c5f558cca7cb..bdd0d3347d905a606123349e55011bc92e91f01b 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -73,6 +73,7 @@
 #include "WebAutofillClient.h"
 #include "WebDevToolsAgentImpl.h"
 #include "WebDevToolsAgentPrivate.h"
+#include "WebFrameClient.h"
 #include "WebFrameImpl.h"
 #include "WebHelperPluginImpl.h"
 #include "WebHitTestResult.h"
@@ -312,18 +313,11 @@ void WebView::didExitModalLoop()
     pageGroupLoadDeferrerStack().removeLast();
 }
 
-void WebViewImpl::initializeMainFrame(WebFrameClient* frameClient)
+void WebViewImpl::initializeMainFrame(WebFrame* frame)
 {
     // NOTE: The WebFrameImpl takes a reference to itself within InitMainFrame
     // and releases that reference once the corresponding Frame is destroyed.
-    RefPtr<WebFrameImpl> frame = WebFrameImpl::create(frameClient);
-
-    frame->initializeAsMainFrame(page());
-}
-
-void WebViewImpl::initializeHelperPluginFrame(WebFrameClient* client)
-{
-    RefPtr<WebFrameImpl> frame = WebFrameImpl::create(client);
+    static_cast<WebFrameImpl*>(frame)->initializeAsMainFrame(page());
 }
 
 void WebViewImpl::setAutofillClient(WebAutofillClient* autofillClient)