ozone: Directly provide size of active mode from HardwareDisplayController

ui/ozone/platform/dri/gbm_surface.cc

 // Copyright 2014 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/ozone/platform/dri/gbm_surface.h"
 
 #include <gbm.h>
 
 #include "base/logging.h"
 #include "ui/ozone/platform/dri/dri_buffer.h"
@@ skipping 82 matching lines @@
     gbm_surface_destroy(native_surface_);
 }
 
 bool GbmSurface::Initialize() {
   // If we're initializing the surface without a controller (possible on startup
   // where the surface creation can happen before the native window delegate
   // IPCs arrive), initialize the size to a valid value such that surface
   // creation doesn't fail.
   gfx::Size size(1, 1);
   if (window_delegate_->GetController()) {
-    const drmModeModeInfo& mode = window_delegate_->GetController()->get_mode();
-    size.SetSize(mode.hdisplay, mode.vdisplay);
+    size = window_delegate_->GetController()->GetModeSize();
   }
   // TODO(dnicoara) Check underlying system support for pixel format.
   native_surface_ =
       gbm_surface_create(gbm_device_,
                          size.width(),
                          size.height(),
                          GBM_BO_FORMAT_XRGB8888,
                          GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
 
   if (!native_surface_)
@@ skipping 38 matching lines @@
 
   // If there was a frontbuffer, it is no longer active. Release it back to GBM.
   if (current_buffer_)
     gbm_surface_release_buffer(native_surface_, current_buffer_);
 
   current_buffer_ = pending_buffer;
   return true;
 }
 
 }  // namespace ui