Move a bunch of content\common code into the content namespace.

content/common/child_process_sandbox_support_impl_shm_linux.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/common/child_process_sandbox_support_impl_linux.h"
+
 #include "base/pickle.h"
 #include "base/posix/unix_domain_socket.h"
-#include "content/common/child_process_sandbox_support_impl_linux.h"
 #include "content/common/sandbox_linux.h"
 
 namespace content {
 
 int MakeSharedMemorySegmentViaIPC(size_t length, bool executable) {
   Pickle request;
   request.WriteInt(LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT);
   request.WriteUInt32(length);
   request.WriteBool(executable);
   uint8_t reply_buf[10];
   int result_fd;
   ssize_t result = UnixDomainSocket::SendRecvMsg(GetSandboxFD(),
                                                  reply_buf, sizeof(reply_buf),
                                                  &result_fd, request);
   if (result == -1)
     return -1;
   return result_fd;
 }
 
 }  // namespace content