RefCounted types should not have public destructors, media/ and gpu/ edition

media/base/mock_callback.h

Index: media/base/mock_callback.h
diff --git a/media/base/mock_callback.h b/media/base/mock_callback.h
index 6d508444cf3415611ac09141563e8cbc698580c3..a3d297ff6fab4758f02d6e3df850020988ab1281 100644
--- a/media/base/mock_callback.h
+++ b/media/base/mock_callback.h
@@ -17,8 +17,12 @@ namespace media {
 class MockClosure : public base::RefCountedThreadSafe<MockClosure> {
  public:
   MockClosure();
-  virtual ~MockClosure();
   MOCK_METHOD0(Run, void());
+
+ protected:
+  friend class base::RefCountedThreadSafe<MockClosure>;
+  virtual ~MockClosure();
+
  private:
   DISALLOW_COPY_AND_ASSIGN(MockClosure);
 };