Introduce IPC::ChannelProxy::Create*() and IPC::SynChannel::Create*()

apps/app_shim/app_shim_host_manager_browsertest_mac.mm

 // Copyright 2013 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 "apps/app_shim/app_shim_host_manager_mac.h"
 
 #include <unistd.h>
 
 #include "apps/app_shim/app_shim_messages.h"
 #include "apps/app_shim/test/app_shim_host_manager_test_api_mac.h"
@@ skipping 45 matching lines @@
   base::FilePath user_data_dir;
   CHECK(PathService::Get(chrome::DIR_USER_DATA, &user_data_dir));
   base::FilePath symlink_path =
       user_data_dir.Append(app_mode::kAppShimSocketSymlinkName);
 
   base::FilePath socket_path;
   CHECK(base::ReadSymbolicLink(symlink_path, &socket_path));
   app_mode::VerifySocketPermissions(socket_path);
 
   IPC::ChannelHandle handle(socket_path.value());
-  channel_.reset(new IPC::ChannelProxy(handle, IPC::Channel::MODE_NAMED_CLIENT,
-      this, io_thread_.message_loop_proxy().get()));
+  channel_ = IPC::ChannelProxy::CreateNamedClient(
+      handle, this, io_thread_.message_loop_proxy().get());
 }
 
 TestShimClient::~TestShimClient() {}
 
 bool TestShimClient::OnMessageReceived(const IPC::Message& message) {
   return true;
 }
 
 void TestShimClient::OnChannelError() {
   // Client should not get any channel errors for the current set of tests.
@@ skipping 184 matching lines @@
   EXPECT_TRUE(base::PathExists(directory_in_tmp_));
   EXPECT_TRUE(base::PathExists(symlink_path_));
 
   // Check that the symlink has been replaced.
   base::FilePath socket_path;
   ASSERT_TRUE(base::ReadSymbolicLink(symlink_path_, &socket_path));
   EXPECT_EQ(app_mode::kAppShimSocketShortName, socket_path.BaseName().value());
 }
 
 }  // namespace