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

ui/gl/gl_context_mac.mm

 // Copyright (c) 2012 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 <memory>
 
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_context_cgl.h"
 #include "ui/gl/gl_context_osmesa.h"
 #include "ui/gl/gl_context_stub.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
 
-namespace gfx {
+namespace gl {
 
 class GLShareGroup;
 
 scoped_refptr<GLContext> GLContext::CreateGLContext(
     GLShareGroup* share_group,
     GLSurface* compatible_surface,
     GpuPreference gpu_preference) {
   TRACE_EVENT0("gpu", "GLContext::CreateGLContext");
   switch (GetGLImplementation()) {
     case kGLImplementationDesktopGL:
@@ skipping 18 matching lines @@
       return context;
     }
     case kGLImplementationMockGL:
       return new GLContextStub(share_group);
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
-}  // namespace gfx
+}  // namespace gl