egl: Don't query EGL_POST_SUB_BUFFER_SUPPORTED_NV without extension

ui/gl/gl_surface_egl.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 "ui/gl/gl_surface_egl.h"
 
 #if defined(OS_ANDROID)
 #include <android/native_window_jni.h>
 #endif
 
@@ skipping 377 matching lines @@
   surface_ = eglCreateWindowSurface(
       GetDisplay(), GetConfig(), window_, &egl_window_attributes[0]);
 
   if (!surface_) {
     LOG(ERROR) << "eglCreateWindowSurface failed with error "
                << GetLastEGLErrorString();
     Destroy();
     return false;
   }
 
-  EGLint surfaceVal;
-  EGLBoolean retVal = eglQuerySurface(GetDisplay(),
-                                      surface_,
-                                      EGL_POST_SUB_BUFFER_SUPPORTED_NV,
-                                      &surfaceVal);
-  supports_post_sub_buffer_ = (surfaceVal && retVal) == EGL_TRUE;
+  if (gfx::g_driver_egl.ext.b_EGL_NV_post_sub_buffer) {
+    EGLint surfaceVal;
+    EGLBoolean retVal = eglQuerySurface(
+        GetDisplay(), surface_, EGL_POST_SUB_BUFFER_SUPPORTED_NV, &surfaceVal);
+    supports_post_sub_buffer_ = (surfaceVal && retVal) == EGL_TRUE;
+  }
 
   if (sync_provider)
     vsync_provider_.reset(sync_provider.release());
   else if (g_egl_sync_control_supported)
     vsync_provider_.reset(new EGLSyncControlVSyncProvider(surface_));
   return true;
 }
 
 void NativeViewGLSurfaceEGL::Destroy() {
   if (surface_) {
@@ skipping 346 matching lines @@
 }
 
 void* SurfacelessEGL::GetShareHandle() {
   return NULL;
 }
 
 SurfacelessEGL::~SurfacelessEGL() {
 }
 
 }  // namespace gfx