Re-upload - Fix crash when we don't have a plane to display

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 56 matching lines @@
   current_planes_ = std::vector<OverlayPlane>(1, primary);
   pending_planes_.clear();
   is_disabled_ = false;
   mode_ = mode;
   return status;
 }
 
 bool HardwareDisplayController::Enable() {
   TRACE_EVENT0("dri", "HDC::Enable");
   DCHECK(!current_planes_.empty());
-  OverlayPlane primary = OverlayPlane::GetPrimaryPlane(current_planes_);
-  DCHECK(primary.buffer.get());
+  const OverlayPlane* primary = OverlayPlane::GetPrimaryPlane(current_planes_);
+  DCHECK(primary->buffer.get());
   bool status = true;
   for (size_t i = 0; i < crtc_controllers_.size(); ++i)
-    status &= crtc_controllers_[i]->Modeset(primary, mode_);
+    status &= crtc_controllers_[i]->Modeset(*primary, mode_);
 
   return status;
 }
 
 void HardwareDisplayController::Disable() {
   TRACE_EVENT0("dri", "HDC::Disable");
   for (size_t i = 0; i < crtc_controllers_.size(); ++i)
     crtc_controllers_[i]->Disable();
 
   is_disabled_ = true;
@@ skipping 147 matching lines @@
 uint64_t HardwareDisplayController::GetTimeOfLastFlip() const {
   uint64_t time = 0;
   for (size_t i = 0; i < crtc_controllers_.size(); ++i)
     if (time < crtc_controllers_[i]->time_of_last_flip())
       time = crtc_controllers_[i]->time_of_last_flip();
 
   return time;
 }
 
 }  // namespace ui