Oilpan: Prepare to make ExecutionContext GarbageCollectedMixin.

Source/modules/filesystem/LocalFileSystem.h

Index: Source/modules/filesystem/LocalFileSystem.h
diff --git a/Source/modules/filesystem/LocalFileSystem.h b/Source/modules/filesystem/LocalFileSystem.h
index f13a782f4c778da0a4f7951bb445eb35bec9f308..4b6f9012cd38cc82b6cd469c491a4f66e72d69b5 100644
--- a/Source/modules/filesystem/LocalFileSystem.h
+++ b/Source/modules/filesystem/LocalFileSystem.h
@@ -71,10 +71,10 @@ protected:
 
 private:
     void requestFileSystemAccessInternal(ExecutionContext*, const Closure& allowed, const Closure& denied);
-    void fileSystemNotAllowedInternal(PassRefPtr<ExecutionContext>, PassRefPtr<CallbackWrapper>);
-    void fileSystemAllowedInternal(PassRefPtr<ExecutionContext>, FileSystemType, PassRefPtr<CallbackWrapper>);
+    void fileSystemNotAllowedInternal(PassRefPtrWillBeRawPtr<ExecutionContext>, PassRefPtr<CallbackWrapper>);
+    void fileSystemAllowedInternal(PassRefPtrWillBeRawPtr<ExecutionContext>, FileSystemType, PassRefPtr<CallbackWrapper>);
     void resolveURLInternal(const KURL&, PassRefPtr<CallbackWrapper>);
-    void deleteFileSystemInternal(PassRefPtr<ExecutionContext>, FileSystemType, PassRefPtr<CallbackWrapper>);
+    void deleteFileSystemInternal(PassRefPtrWillBeRawPtr<ExecutionContext>, FileSystemType, PassRefPtr<CallbackWrapper>);
     OwnPtr<FileSystemClient> m_client;
 };