ozone: drm: Fix graphics buffer handle leak in DrmConsoleBuffer

ui/ozone/platform/drm/gpu/drm_device.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_device.h"
 
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <unistd.h>
 #include <xf86drm.h>
@@ skipping 460 matching lines @@
 void DrmDevice::DestroyDumbBuffer(const SkImageInfo& info,
                                   uint32_t handle,
                                   uint32_t stride,
                                   void* pixels) {
   DCHECK(file_.IsValid());
   TRACE_EVENT1("drm", "DrmDevice::DestroyDumbBuffer", "handle", handle);
   munmap(pixels, info.getSafeSize(stride));
   DrmDestroyDumbBuffer(file_.GetPlatformFile(), handle);
 }
 
+bool DrmDevice::CloseBufferHandle(uint32_t handle) {
+  struct drm_gem_close close_request;
+  memset(&close_request, 0, sizeof(close_request));
+  close_request.handle = handle;
+  return !drmIoctl(file_.GetPlatformFile(), DRM_IOCTL_GEM_CLOSE,
+                   &close_request);
+}
+
 bool DrmDevice::CommitProperties(drmModePropertySet* properties,
                                  uint32_t flags,
                                  const PageFlipCallback& callback) {
 #if defined(USE_DRM_ATOMIC)
   scoped_ptr<PageFlipPayload> payload(
       new PageFlipPayload(base::ThreadTaskRunnerHandle::Get(), callback));
   if (!drmModePropertySetCommit(file_.GetPlatformFile(), flags, payload.get(),
                                 properties)) {
     // If successful the payload will be removed by the event
     ignore_result(payload.release());
     return true;
   }
   return false;
 #else
   return false;
 #endif  // defined(USE_DRM_ATOMIC)
 }
 
 bool DrmDevice::SetMaster() {
   DCHECK(file_.IsValid());
   return (drmSetMaster(file_.GetPlatformFile()) == 0);
 }
 
 bool DrmDevice::DropMaster() {
   DCHECK(file_.IsValid());
   return (drmDropMaster(file_.GetPlatformFile()) == 0);
 }
 
 }  // namespace ui