command_buffer_gles2: Implement EGL default Display as a global object

gpu/gles2_conform_support/egl/test_support.cc

 // Copyright (c) 2016 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 "test_support.h"
+#include "gpu/gles2_conform_support/egl/display.h"
+#include "gpu/gles2_conform_support/egl/thread_state.h"
 
 #if defined(COMPONENT_BUILD) && defined(COMMAND_BUFFER_GLES_LIB_SUPPORT_ONLY)
 bool g_command_buffer_gles_has_atexit_manager;
 #endif
+
+extern "C" {
+EGLAPI void EGLAPIENTRY
+CommandBufferGLESSetNextCreateWindowSurfaceCreatesPBuffer(EGLDisplay dpy,
+                                                          EGLint width,
+                                                          EGLint height) {
+  egl::ThreadState* ts = egl::ThreadState::Get();
+  egl::Display* display = ts->GetDisplay(dpy);
+  if (!display)
+    return;
+  display->SetNextCreateWindowSurfaceCreatesPBuffer(width, height);
+}
+}