Fix gl_tests

gpu/command_buffer/tests/gl_tests_main.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 "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
+#include "gpu/command_buffer/client/gles2_lib.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/gl/gl_surface.h"
 
 #if defined(TOOLKIT_GTK)
 #include "ui/gfx/gtk_util.h"
 #endif
 
 int main(int argc, char** argv) {
   base::AtExitManager exit_manager;
   CommandLine::Init(argc, argv);
 #if defined(TOOLKIT_GTK)
     gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
 #endif
   gfx::GLSurface::InitializeOneOff();
+  ::gles2::Initialize();
   MessageLoop::Type message_loop_type = MessageLoop::TYPE_UI;
   MessageLoop main_message_loop(message_loop_type);
   testing::InitGoogleMock(&argc, argv);
   return RUN_ALL_TESTS();
 }