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

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index d2dcee530b332cbff81ae867f82e514fe6c3e9ae..cc2cefbbc2d1785a81de4b06268b4f913e2eb317 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -30,7 +30,6 @@ class GPU_EXPORT FramebufferManager {
      public:
       typedef scoped_refptr<Attachment> Ref;
 
-      virtual ~Attachment() { }
       virtual GLsizei width() const = 0;
       virtual GLsizei height() const = 0;
       virtual GLenum internal_format() const = 0;
@@ -45,6 +44,10 @@ class GPU_EXPORT FramebufferManager {
       virtual bool CanRenderTo() const = 0;
       virtual void DetachFromFramebuffer() = 0;
       virtual bool ValidForAttachmentType(GLenum attachment_type) = 0;
+
+     protected:
+      friend class base::RefCounted<Attachment>;
+      virtual ~Attachment() {}
     };
 
     FramebufferInfo(FramebufferManager* manager, GLuint service_id);