Refactoring: Make IPC::Channel::TakeClientFileDescriptor() a ScopedFD.

content/common/gpu/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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/common/gpu/gpu_channel.h"
 
@@ skipping 438 matching lines @@
   channel_->AddFilter(filter_.get());
 
   devtools_gpu_agent_.reset(new DevToolsGpuAgent(this));
 }
 
 std::string GpuChannel::GetChannelName() {
   return channel_id_;
 }
 
 #if defined(OS_POSIX)
-int GpuChannel::TakeRendererFileDescriptor() {
+base::ScopedFD GpuChannel::TakeRendererFileDescriptor() {
   if (!channel_) {
     NOTREACHED();
-    return -1;
+    return base::ScopedFD();
   }
   return channel_->TakeClientFileDescriptor();
 }
 #endif  // defined(OS_POSIX)
 
 bool GpuChannel::OnMessageReceived(const IPC::Message& message) {
   if (log_messages_) {
     DVLOG(1) << "received message @" << &message << " on channel @" << this
              << " with type " << message.type();
   }
@@ skipping 339 matching lines @@
 uint64 GpuChannel::GetMemoryUsage() {
   uint64 size = 0;
   for (StubMap::Iterator<GpuCommandBufferStub> it(&stubs_);
        !it.IsAtEnd(); it.Advance()) {
     size += it.GetCurrentValue()->GetMemoryUsage();
   }
   return size;
 }
 
 }  // namespace content