command_buffer_gles2: Implement EGL default Display as a global object

gpu/gles2_conform_support/native/egl_native_windowless.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 "gpu/gles2_conform_support/egl/display.h"
-
 extern "C" {
 #if defined(GLES2_CONFORM_SUPPORT_ONLY)
 #include "gpu/gles2_conform_support/gtf/gtf_stubs.h"
 #else
 #include "third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglNative.h"
 #endif
 
 GTFbool GTFNativeCreateDisplay(EGLNativeDisplayType *pNativeDisplay) {
   *pNativeDisplay = EGL_DEFAULT_DISPLAY;
   return GTFtrue;
 }
 
 void GTFNativeDestroyDisplay(EGLNativeDisplayType nativeDisplay) {
   // Nothing to destroy since we are using EGL_DEFAULT_DISPLAY
 }
 
 GTFbool GTFNativeCreateWindow(EGLNativeDisplayType nativeDisplay,
                               EGLDisplay eglDisplay, EGLConfig eglConfig,
                               const char* title, int width, int height,
                               EGLNativeWindowType *pNativeWindow) {
-  egl::Display* display = static_cast<egl::Display*>(eglDisplay);
-  display->SetCreateOffscreen(width, height);
-  return GTFtrue;
+  // GTF should use EGL pbuffer interface directly.
+  return GTFfalse;
 }
 
 void GTFNativeDestroyWindow(EGLNativeDisplayType nativeDisplay,
                             EGLNativeWindowType nativeWindow) {
 }
 
 EGLImageKHR GTFCreateEGLImage(int width, int height,
                               GLenum format, GLenum type) {
   return (EGLImageKHR)NULL;
 }
 
 void GTFDestroyEGLImage(EGLImageKHR image) {
 }
 
 }  // extern "C"