Get rid of base::SharedMemory::NULLHandle();

gpu/ipc/client/gpu_channel_host.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/client/gpu_channel_host.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
@@ skipping 209 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner =
       factory_->GetIOThreadTaskRunner();
   io_task_runner->PostTask(
       FROM_HERE, base::Bind(&GpuChannelHost::MessageFilter::RemoveRoute,
                             channel_filter_, route_id));
 }
 
 base::SharedMemoryHandle GpuChannelHost::ShareToGpuProcess(
     const base::SharedMemoryHandle& source_handle) {
   if (IsLost())
-    return base::SharedMemory::NULLHandle();
+    return base::SharedMemoryHandle();
 
   return base::SharedMemory::DuplicateHandle(source_handle);
 }
 
 int32_t GpuChannelHost::ReserveTransferBufferId() {
   // 0 is a reserved value.
   return g_next_transfer_buffer_id.GetNext() + 1;
 }
 
 int32_t GpuChannelHost::ReserveImageId() {
@@ skipping 140 matching lines @@
 
   listeners_.clear();
 }
 
 bool GpuChannelHost::MessageFilter::IsLost() const {
   AutoLock lock(lock_);
   return lost_;
 }
 
 }  // namespace gpu