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

ui/gl/gl_fence_apple.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 "ui/gl/gl_fence_apple.h"
 
 #include "ui/gl/gl_bindings.h"
 
-namespace gfx {
+namespace gl {
 
 GLFenceAPPLE::GLFenceAPPLE() {
   glGenFencesAPPLE(1, &fence_);
   glSetFenceAPPLE(fence_);
   DCHECK(glIsFenceAPPLE(fence_));
   glFlush();
 }
 
 bool GLFenceAPPLE::HasCompleted() {
   DCHECK(glIsFenceAPPLE(fence_));
   return !!glTestFenceAPPLE(fence_);
 }
 
 void GLFenceAPPLE::ClientWait() {
   DCHECK(glIsFenceAPPLE(fence_));
   glFinishFenceAPPLE(fence_);
 }
 
 void GLFenceAPPLE::ServerWait() {
   DCHECK(glIsFenceAPPLE(fence_));
   ClientWait();
 }
 
 GLFenceAPPLE::~GLFenceAPPLE() {
   DCHECK(glIsFenceAPPLE(fence_));
   glDeleteFencesAPPLE(1, &fence_);
 }
 
-}  // namespace gfx
+}  // namespace gl