Mojo EDK: Add safe process connection API

services/service_manager/runner/common/client_util.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/service_manager/runner/common/client_util.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/embedder/pending_process_connection.h"
 #include "services/service_manager/runner/common/switches.h"
 
 namespace service_manager {
 
 mojom::ServicePtr PassServiceRequestOnCommandLine(
-    base::CommandLine* command_line, const std::string& child_token) {
-  std::string token = mojo::edk::GenerateRandomToken();
+    mojo::edk::PendingProcessConnection* connection,
+    base::CommandLine* command_line) {
+  std::string token;
+  mojom::ServicePtr client;
+  client.Bind(mojom::ServicePtrInfo(connection->CreateMessagePipe(&token), 0));
   command_line->AppendSwitchASCII(switches::kPrimordialPipeToken, token);
-
-  mojom::ServicePtr client;
-  client.Bind(
-      mojom::ServicePtrInfo(
-          mojo::edk::CreateParentMessagePipe(token, child_token), 0));
   return client;
 }
 
 mojom::ServiceRequest GetServiceRequestFromCommandLine() {
   std::string token =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kPrimordialPipeToken);
   mojom::ServiceRequest request;
   if (!token.empty())
     request.Bind(mojo::edk::CreateChildMessagePipe(token));
   return request;
 }
 
 bool ServiceManagerIsRemote() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kPrimordialPipeToken);
 }
 
 }  // namespace service_manager