ui: Add ref-counting to GLFence class.

gpu/command_buffer/service/fence_manager.cc

 // Copyright 2016 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/command_buffer/service/fence_manager.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "ui/gl/gl_fence.h"
 
 namespace gpu {
 namespace gles2 {
 
 FenceManager::FenceManager() {}
 
 FenceManager::~FenceManager() {}
 
 void FenceManager::Destroy(bool have_context) {
   if (!have_context) {
     for (auto& fence_entry : fences_)
       fence_entry.second.get()->Invalidate();
   }
   fences_.clear();
 }
 
-void FenceManager::AddFence(std::unique_ptr<gl::GLFence> fence,
-                            int32_t service_id) {
+void FenceManager::AddFence(gl::GLFence* fence, int32_t service_id) {
   DCHECK(fences_.find(service_id) == fences_.end());
-  fences_[service_id] = std::move(fence);
+  fences_[service_id] = fence;
 }
 
 void FenceManager::RemoveFence(int32_t service_id) {
   GLFenceMap::iterator iter = fences_.find(service_id);
   DCHECK(iter != fences_.end());
   fences_.erase(iter);
 }
 
 gl::GLFence* FenceManager::LookupFence(int32_t service_id) {
   GLFenceMap::const_iterator iter = fences_.find(service_id);
   if (iter != fences_.end())
     return iter->second.get();
 
   return NULL;
 }
 
 }  // namespace gles2
 }  // namespace gpu