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

ui/gl/glx_api_unittest.cc

 // Copyright 2015 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/command_line.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_glx_api_implementation.h"
 #include "ui/gl/gl_implementation.h"
 
-namespace gfx {
+namespace gl {
 
 class GLXApiTest : public testing::Test {
  public:
   void SetUp() override {
     fake_extension_string_ = "";
 
     g_driver_glx.ClearBindings();
     g_driver_glx.fn.glXQueryExtensionsStringFn = &FakeQueryExtensionsString;
     SetGLImplementation(kGLImplementationMockGL);
     SetGLGetProcAddressProc(
@@ skipping 84 matching lines @@
   EXPECT_STREQ(kFakeExtensions, GetExtensions());
 
   base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
   command_line.AppendSwitchASCII(switches::kDisableGLExtensions,
                                  kFakeDisabledExtensions);
   InitializeAPI(&command_line);
 
   EXPECT_STREQ(kFilteredExtensions, GetExtensions());
 }
 
-}  // namespace gfx
+}  // namespace gl