command_buffer_gles2: Implement EGL default Display as a global object

gpu/khronos_glcts_support/native/egl_native_windowless.cc

Index: gpu/khronos_glcts_support/native/egl_native_windowless.cc
diff --git a/gpu/khronos_glcts_support/native/egl_native_windowless.cc b/gpu/khronos_glcts_support/native/egl_native_windowless.cc
index 0bed202b0a847846ee939d9d5b27e9d3aa25cd7c..548f90b258b642c6695ccad186364819135aa836 100644
--- a/gpu/khronos_glcts_support/native/egl_native_windowless.cc
+++ b/gpu/khronos_glcts_support/native/egl_native_windowless.cc
@@ -6,7 +6,7 @@
 // TODO: We may want to phase out the old gles2_conform support in preference
 // of this implementation.  So eventually we'll need to move the egl_native
 // stuff here or to a shareable location/path.
-#include "gpu/gles2_conform_support/egl/display.h"
+#include "gpu/gles2_conform_support/egl/test_support.h"
 
 #include "third_party/khronos_glcts/framework/egl/tcuEglPlatform.hpp"
 
@@ -74,9 +74,9 @@ class Platform : public tcu::EglPlatform {
                                   int height,
                                   qpVisibility visibility) override {
     tcu::egl::Display& eglDisplay = dpy.getEglDisplay();
-    egl::Display* display =
-        static_cast<egl::Display*>(eglDisplay.getEGLDisplay());
-    display->SetCreateOffscreen(width, height);
+    EGLDisplay display = eglDisplay.getEGLDisplay();
+    CommandBufferGLESSetNextCreateWindowSurfaceCreatesPBuffer(display, width,
+                                                              height);
     return new Window(eglDisplay, config, attribList, width, height);
   }
 };