ozone: Directly provide size of active mode from HardwareDisplayController

ui/ozone/platform/dri/hardware_display_controller.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/hardware_display_controller.h"
 
 #include <drm.h>
 #include <errno.h>
 #include <string.h>
 #include <xf86drm.h>
@@ skipping 240 matching lines @@
 }
 
 bool HardwareDisplayController::IsMirrored() const {
   return crtc_states_.size() > 1;
 }
 
 bool HardwareDisplayController::IsDisabled() const {
   return is_disabled_;
 }
 
+gfx::Size HardwareDisplayController::GetModeSize() const {
+  return gfx::Size(mode_.hdisplay, mode_.vdisplay);
+}
+
 bool HardwareDisplayController::ModesetCrtc(
     const scoped_refptr<ScanoutBuffer>& buffer,
     drmModeModeInfo mode,
     CrtcState* state) {
   if (!drm_->SetCrtc(state->crtc(),
                      buffer->GetFramebufferId(),
                      std::vector<uint32_t>(1, state->connector()),
                      &mode)) {
     LOG(ERROR) << "Failed to modeset: error='" << strerror(errno)
                << "' crtc=" << state->crtc()
@@ skipping 49 matching lines @@
                                plane.overlay_plane)) {
       LOG(ERROR) << "Cannot display on overlay: " << strerror(errno);
       return false;
     }
   }
 
   return true;
 }
 
 }  // namespace ui