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

media/base/mock_callback.cc

Index: media/base/mock_callback.cc
diff --git a/media/base/mock_callback.cc b/media/base/mock_callback.cc
index 58cc98e16de07079d07de319512cfdef82b766ca..033febd98a936483a633b636700dc0b4d04368f2 100644
--- a/media/base/mock_callback.cc
+++ b/media/base/mock_callback.cc
@@ -23,8 +23,12 @@ base::Closure NewExpectedClosure() {
 class MockStatusCB : public base::RefCountedThreadSafe<MockStatusCB> {
  public:
   MockStatusCB() {}
-  virtual ~MockStatusCB() {}
   MOCK_METHOD1(Run, void(PipelineStatus));
+
+ protected:
+  friend class base::RefCountedThreadSafe<MockStatusCB>;
+  virtual ~MockStatusCB() {}
+
  private:
   DISALLOW_COPY_AND_ASSIGN(MockStatusCB);
 };