Remove a bunch of provisionalDataSource() usage.

third_party/WebKit/Source/core/loader/EmptyClients.cpp

Index: third_party/WebKit/Source/core/loader/EmptyClients.cpp
diff --git a/third_party/WebKit/Source/core/loader/EmptyClients.cpp b/third_party/WebKit/Source/core/loader/EmptyClients.cpp
index 95a92bacd5c6cfea3259a204e998e01183d1b12b..e7b27e1d104212918d4aa8fab106dbf8c78348d5 100644
--- a/third_party/WebKit/Source/core/loader/EmptyClients.cpp
+++ b/third_party/WebKit/Source/core/loader/EmptyClients.cpp
@@ -110,10 +110,6 @@ void EmptyFrameLoaderClient::dispatchWillSendSubmitEvent(HTMLFormElement*)
 {
 }
 
-void EmptyFrameLoaderClient::dispatchWillSubmitForm(HTMLFormElement*)
-{
-}
-
 PassRefPtrWillBeRawPtr<DocumentLoader> EmptyFrameLoaderClient::createDocumentLoader(LocalFrame* frame, const ResourceRequest& request, const SubstituteData& substituteData)
 {
     return DocumentLoader::create(frame, request, substituteData);