ui: Add ref-counting to GLFence class.

gpu/ipc/service/gpu_channel.cc

 // Copyright (c) 2012 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 "gpu/ipc/service/gpu_channel.h"
 
 #include <utility>
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 1056 matching lines @@
         return nullptr;
 
       return manager->gpu_memory_buffer_factory()
           ->AsImageFactory()
           ->CreateImageForGpuMemoryBuffer(handle, size, format, internalformat,
                                           client_id_, surface_handle);
     }
   }
 }
 
-std::unique_ptr<gl::GLFence> GpuChannel::CreateFenceForGpuFence(
+scoped_refptr<gl::GLFence> GpuChannel::CreateFenceForGpuFence(
     const gfx::GpuFenceHandle& handle) {
 #if defined(OS_LINUX)
   base::ScopedFD libsync_fd(handle.fd.fd);
   if (libsync_fd.is_valid())
-    return base::MakeUnique<gl::GLFenceLibsync>(std::move(libsync_fd));
+    return make_scoped_refptr(new gl::GLFenceLibsync(std::move(libsync_fd)));
 #endif
 
-  return base::MakeUnique<gl::GLFenceSharedEvent>(handle.shared_event_handle);
+  return make_scoped_refptr(
+      new gl::GLFenceSharedEvent(handle.shared_event_handle));
 }
 
 }  // namespace gpu