Revert 181883

ui/gl/async_pixel_transfer_delegate.h

Index: ui/gl/async_pixel_transfer_delegate.h
===================================================================
--- ui/gl/async_pixel_transfer_delegate.h	(revision 182062)
+++ ui/gl/async_pixel_transfer_delegate.h	(working copy)
@@ -78,8 +78,6 @@
 
 class GL_EXPORT AsyncPixelTransferDelegate {
  public:
-  typedef base::Callback<void(const AsyncMemoryParams&)> CompletionCallback;
-
   static scoped_ptr<AsyncPixelTransferDelegate>
       Create(gfx::GLContext* context);
   virtual ~AsyncPixelTransferDelegate() {}
@@ -91,10 +89,8 @@
     return make_scoped_ptr(CreateRawPixelTransferState(texture_id));
   }
 
-  // There's no guarantee that callback will run on the caller thread.
   virtual void AsyncNotifyCompletion(
-      const AsyncMemoryParams& mem_params,
-      const CompletionCallback& callback) = 0;
+      const base::Closure& notify_task) = 0;
 
   virtual void AsyncTexImage2D(
       AsyncPixelTransferState* state,