Put the Pepper stuff in the content namespace.

content/renderer/pepper/pepper_proxy_channel_delegate_impl.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 "content/renderer/pepper/pepper_proxy_channel_delegate_impl.h"
 
 #include "content/common/child_process.h"
 
+namespace content {
+
 PepperProxyChannelDelegateImpl::~PepperProxyChannelDelegateImpl() {
 }
 
 base::MessageLoopProxy* PepperProxyChannelDelegateImpl::GetIPCMessageLoop() {
   // This is called only in the renderer so we know we have a child process.
   DCHECK(ChildProcess::current()) << "Must be in the renderer.";
   return ChildProcess::current()->io_message_loop_proxy();
 }
 
 base::WaitableEvent* PepperProxyChannelDelegateImpl::GetShutdownEvent() {
   DCHECK(ChildProcess::current()) << "Must be in the renderer.";
   return ChildProcess::current()->GetShutDownEvent();
 }
+
+}  // namespace content