Oilpan: Prepare to move FormSubmission to Oilpan heap.

Source/core/html/HTMLFormElement.h

Index: Source/core/html/HTMLFormElement.h
diff --git a/Source/core/html/HTMLFormElement.h b/Source/core/html/HTMLFormElement.h
index e5fe6d36aeedb2cbe626dbd0b2137358563796d1..a029b3c1abd2f0fceda5277682d9a767cce1745e 100644
--- a/Source/core/html/HTMLFormElement.h
+++ b/Source/core/html/HTMLFormElement.h
@@ -136,10 +136,10 @@ private:
 
     virtual void copyNonAttributePropertiesFromElement(const Element&) OVERRIDE;
 
-    void submitDialog(PassRefPtr<FormSubmission>);
+    void submitDialog(PassRefPtrWillBeRawPtr<FormSubmission>);
     void submit(Event*, bool activateSubmitButton, bool processingUserGesture, FormSubmissionTrigger);
 
-    void scheduleFormSubmission(PassRefPtr<FormSubmission>);
+    void scheduleFormSubmission(PassRefPtrWillBeRawPtr<FormSubmission>);
 
     void collectAssociatedElements(Node& root, FormAssociatedElement::List&) const;
     void collectImageElements(Node& root, WillBeHeapVector<RawPtrWillBeMember<HTMLImageElement> >&);