Oilpan: Prepare to move FormSubmission to Oilpan heap.

Source/core/loader/NavigationScheduler.cpp

Index: Source/core/loader/NavigationScheduler.cpp
diff --git a/Source/core/loader/NavigationScheduler.cpp b/Source/core/loader/NavigationScheduler.cpp
index 2a396ff368ae4591ff8184ace2ef28984cc0b807..cd179c2d5622916dfcb48c9fe2ea893c05e30ef7 100644
--- a/Source/core/loader/NavigationScheduler.cpp
+++ b/Source/core/loader/NavigationScheduler.cpp
@@ -199,7 +199,7 @@ private:
 
 class ScheduledFormSubmission FINAL : public ScheduledNavigation {
 public:
-    ScheduledFormSubmission(PassRefPtr<FormSubmission> submission, bool lockBackForwardList)
+    ScheduledFormSubmission(PassRefPtrWillBeRawPtr<FormSubmission> submission, bool lockBackForwardList)
         : ScheduledNavigation(0, lockBackForwardList, true)
         , m_submission(submission)
     {
@@ -221,7 +221,7 @@ public:
     FormSubmission* submission() const { return m_submission.get(); }
 
 private:
-    RefPtr<FormSubmission> m_submission;
+    RefPtrWillBePersistent<FormSubmission> m_submission;
 };
 
 NavigationScheduler::NavigationScheduler(LocalFrame* frame)
@@ -321,7 +321,7 @@ void NavigationScheduler::scheduleLocationChange(Document* originDocument, const
     schedule(adoptPtr(new ScheduledLocationChange(originDocument, url, referrer, lockBackForwardList)));
 }
 
-void NavigationScheduler::scheduleFormSubmission(PassRefPtr<FormSubmission> submission)
+void NavigationScheduler::scheduleFormSubmission(PassRefPtrWillBeRawPtr<FormSubmission> submission)
 {
     ASSERT(m_frame->page());
     schedule(adoptPtr(new ScheduledFormSubmission(submission, mustLockBackForwardList(m_frame))));