Fix ppapi TwoWayTest so that it constructs a unique IPC::ChannelHandle.

ppapi/proxy/ppapi_proxy_test.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 "ppapi/proxy/ppapi_proxy_test.h"
 
+#include <sstream>
+
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop_proxy.h"
 #include "base/observer_list.h"
+#include "base/process_util.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_proxy_private.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 // HostDispatcher requires a PPB_Proxy_Private, so we always provide a fallback
@@ skipping 387 matching lines @@
 TwoWayTest::~TwoWayTest() {
   shutdown_event_.Signal();
 }
 
 void TwoWayTest::SetUp() {
   base::Thread::Options options;
   options.message_loop_type = MessageLoop::TYPE_IO;
   io_thread_.StartWithOptions(options);
   plugin_thread_.Start();
 
-  IPC::ChannelHandle handle;
-  handle.name = "TwoWayTestChannel";
+  // Construct the IPC handle name using the process ID so we can safely run
+  // multiple |TwoWayTest|s concurrently.
+  std::ostringstream handle_name;
+  handle_name << "TwoWayTestChannel" << base::GetCurrentProcId();
+  IPC::ChannelHandle handle(handle_name.str());
   base::WaitableEvent remote_harness_set_up(true, false);
   plugin_thread_.message_loop_proxy()->PostTask(
       FROM_HERE,
       base::Bind(&SetUpRemoteHarness,
                  remote_harness_,
                  handle,
                  io_thread_.message_loop_proxy(),
                  &shutdown_event_,
                  &remote_harness_set_up));
   remote_harness_set_up.Wait();
@@ skipping 22 matching lines @@
   plugin_thread_.message_loop_proxy()->PostTask(FROM_HERE,
       base::Bind(&RunTaskOnRemoteHarness,
                  task,
                  &task_complete));
   task_complete.Wait();
 }
 
 
 }  // namespace proxy
 }  // namespace ppapi