Move last of platform dependent init from //ui/gl to //ui/gl/init.

ui/gl/gl_implementation_mac.cc

-// 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 "ui/gl/gl_implementation.h"
-
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "ui/gl/gl_context_stub_with_extensions.h"
-#include "ui/gl/gl_gl_api_implementation.h"
-#include "ui/gl/gl_osmesa_api_implementation.h"
-
-namespace gl {
-
-void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableUnsafeES3APIs)) {
-    impls->push_back(kGLImplementationDesktopGLCoreProfile);
-  }
-  impls->push_back(kGLImplementationDesktopGL);
-  impls->push_back(kGLImplementationAppleGL);
-  impls->push_back(kGLImplementationOSMesaGL);
-}
-
-bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
-  return false;
-}
-
-}  // namespace gl