Move shell service to toplevel shell namespace

services/shell/runner/host/mach_broker.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 "services/shell/runner/host/mach_broker.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 
-namespace mojo {
 namespace shell {
 
 namespace {
 const char kBootstrapPortName[] = "mojo_shell";
 }
 
 // static
 void MachBroker::SendTaskPortToParent() {
   bool result = base::MachPortBroker::ChildSendTaskPortToParent(
       kBootstrapPortName);
@@ skipping 14 matching lines @@
 
 void MachBroker::ExpectPid(base::ProcessHandle pid) {
   broker_.AddPlaceholderForPid(pid);
 }
 
 void MachBroker::RemovePid(base::ProcessHandle pid) {
   broker_.InvalidatePid(pid);
 }
 
 }  // namespace shell
-}  // namespace mojo