Move code in ui/gl/* from gfx:: to gl::

components/mus/surfaces/surfaces_context_provider.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/mus/surfaces/surfaces_context_provider.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 105 matching lines @@
     delegate_->OnVSyncParametersUpdated(timebase, interval);
 }
 
 void SurfacesContextProvider::GpuCompletedSwapBuffers(gfx::SwapResult result) {
   if (!swap_buffers_completion_callback_.is_null()) {
     swap_buffers_completion_callback_.Run(result);
   }
 }
 
 void SurfacesContextProvider::SetSwapBuffersCompletionCallback(
-    gfx::GLSurface::SwapCompletionCallback callback) {
+    gl::GLSurface::SwapCompletionCallback callback) {
   swap_buffers_completion_callback_ = callback;
 }
 
 }  // namespace mus