Oilpan: move context menu providers to the heap.

Source/core/inspector/InspectorClient.h

Index: Source/core/inspector/InspectorClient.h
diff --git a/Source/core/inspector/InspectorClient.h b/Source/core/inspector/InspectorClient.h
index 3d35e8419b8648cefd47b112a46a03fab8d7894c..46782a80c2890115d478571e76676ee4a46ba539 100644
--- a/Source/core/inspector/InspectorClient.h
+++ b/Source/core/inspector/InspectorClient.h
@@ -71,7 +71,7 @@ public:
     virtual float minimumPageScaleFactor() { return 1; }
     virtual float maximumPageScaleFactor() { return 1; }
     virtual void setPageScaleFactor(float) { }
-    virtual void showContextMenu(float x, float y, PassRefPtr<ContextMenuProvider>) { }
+    virtual void showContextMenu(float x, float y, PassRefPtrWillBeRawPtr<ContextMenuProvider>) { }
 
     virtual void dispatchKeyEvent(const PlatformKeyboardEvent&) { }
     virtual void dispatchMouseEvent(const PlatformMouseEvent&) { }