command_buffer_gles2: Implement EGL default Display as a global object

gpu/gles2_conform_support/native/egl_native_windowless.cc

Index: gpu/gles2_conform_support/native/egl_native_windowless.cc
diff --git a/gpu/gles2_conform_support/native/egl_native_windowless.cc b/gpu/gles2_conform_support/native/egl_native_windowless.cc
index 725d0a05083fb76380e5a9e0bb471925404af07d..94d6dacac28f120c62973542267842f59b8f742b 100644
--- a/gpu/gles2_conform_support/native/egl_native_windowless.cc
+++ b/gpu/gles2_conform_support/native/egl_native_windowless.cc
@@ -2,7 +2,7 @@
 // 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"
+#include "gpu/gles2_conform_support/egl/test_support.h"
 
 extern "C" {
 #if defined(GLES2_CONFORM_SUPPORT_ONLY)
@@ -24,8 +24,8 @@ 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);
+  CommandBufferGLESSetNextCreateWindowSurfaceCreatesPBuffer(eglDisplay, width,
+                                                            height);
   return GTFtrue;
 }