Fix the uses of T* conversion operator from scoped_refptr<T> which is now removed.

ui/ozone/platform/dri/dri_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/dri_surface.h"
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkSurface.h"
@@ skipping 46 matching lines @@
     return;
 
   // For the display buffers use the mode size since a |viewport_size| smaller
   // than the display size will not scanout.
   for (size_t i = 0; i < arraysize(buffers_); ++i)
     buffers_[i] = AllocateBuffer(dri_, controller->GetModeSize());
 }
 
 void DriSurface::PresentCanvas(const gfx::Rect& damage) {
   DCHECK(base::MessageLoopForUI::IsCurrent());
-  DCHECK(buffers_[front_buffer_ ^ 1]);
+  DCHECK(buffers_[front_buffer_ ^ 1].get());
 
   HardwareDisplayController* controller = window_delegate_->GetController();
   if (!controller)
     return;
 
   controller->QueueOverlayPlane(OverlayPlane(buffers_[front_buffer_ ^ 1]));
 
   UpdateNativeSurface(damage);
   controller->SchedulePageFlip();
   controller->WaitForPageFlipEvent();
@@ skipping 14 matching lines @@
   SkRect real_damage = RectToSkRect(UnionRects(damage, last_damage_));
 
   // Copy damage region.
   skia::RefPtr<SkImage> image = skia::AdoptRef(surface_->newImageSnapshot());
   image->draw(canvas, &real_damage, real_damage, NULL);
 
   last_damage_ = damage;
 }
 
 }  // namespace ui