ozone: drm: Fix graphics buffer handle leak in DrmConsoleBuffer

ui/ozone/platform/drm/gpu/drm_device.h

 // 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.
 
 #ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 136 matching lines @@
   virtual bool CreateDumbBuffer(const SkImageInfo& info,
                                 uint32_t* handle,
                                 uint32_t* stride,
                                 void** pixels);
 
   virtual void DestroyDumbBuffer(const SkImageInfo& info,
                                  uint32_t handle,
                                  uint32_t stride,
                                  void* pixels);
 
+  virtual bool CloseBufferHandle(uint32_t handle);
+
   virtual bool CommitProperties(drmModePropertySet* properties,
                                 uint32_t flags,
                                 const PageFlipCallback& callback);
 
   // Drm master related
   virtual bool SetMaster();
   virtual bool DropMaster();
 
   int get_fd() const { return file_.GetPlatformFile(); }
 
@@ skipping 22 matching lines @@
 
   // Watcher for |fd_| listening for page flip events.
   scoped_refptr<IOWatcher> watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmDevice);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_H_