ozone: drm: Fix graphics buffer handle leak in DrmConsoleBuffer

ui/ozone/platform/drm/gpu/drm_console_buffer.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/drm/gpu/drm_console_buffer.h"
 
 #include <sys/mman.h>
 #include <xf86drmMode.h>
 
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 #include "ui/ozone/platform/drm/gpu/drm_util.h"
 #include "ui/ozone/platform/drm/gpu/scoped_drm_types.h"
 
 namespace ui {
 
 DrmConsoleBuffer::DrmConsoleBuffer(const scoped_refptr<DrmDevice>& drm,
                                    uint32_t framebuffer)
     : drm_(drm),
       handle_(0),
       framebuffer_(framebuffer),
       mmap_base_(NULL),
       mmap_size_(0) {
 }
 
 DrmConsoleBuffer::~DrmConsoleBuffer() {
   if (mmap_base_)
     if (munmap(mmap_base_, mmap_size_))
       PLOG(ERROR) << "munmap";
+
+  if (handle_ && !drm_->CloseBufferHandle(handle_))
+    PLOG(ERROR) << "DrmConsoleBuffer: CloseBufferHandle: handle " << handle_;
 }
 
 bool DrmConsoleBuffer::Initialize() {
   ScopedDrmFramebufferPtr fb(drm_->GetFramebuffer(framebuffer_));
 
   if (!fb)
     return false;
 
   handle_ = fb->handle;
   stride_ = fb->pitch;
   SkImageInfo info = SkImageInfo::MakeN32Premul(fb->width, fb->height);
 
   mmap_size_ = info.getSafeSize(stride_);
 
   if (!MapDumbBuffer(drm_->get_fd(), fb->handle, mmap_size_, &mmap_base_)) {
     mmap_base_ = NULL;
     return false;
   }
 
   surface_ =
       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
   if (!surface_)
     return false;
 
   return true;
 }
 
 }  // namespace ui