egl: Don't query EGL_POST_SUB_BUFFER_SUPPORTED_NV without extension

ui/gl/gl_surface_egl.cc

Index: ui/gl/gl_surface_egl.cc
diff --git a/ui/gl/gl_surface_egl.cc b/ui/gl/gl_surface_egl.cc
index 3a453b6e20fdf19816f6bfea3e8ff63516221262..4018834de17de1831e9b064bbc5cb3de646d8a9d 100644
--- a/ui/gl/gl_surface_egl.cc
+++ b/ui/gl/gl_surface_egl.cc
@@ -395,12 +395,12 @@ bool NativeViewGLSurfaceEGL::Initialize(
     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());