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

remoting/host/ipc_desktop_environment_unittest.cc

Index: remoting/host/ipc_desktop_environment_unittest.cc
diff --git a/remoting/host/ipc_desktop_environment_unittest.cc b/remoting/host/ipc_desktop_environment_unittest.cc
index 7e3168868ab21c3a7f0fd38526b1cf0e0099d5b1..32ce885cd96a0f61987414ef2343a7f51c53ad8f 100644
--- a/remoting/host/ipc_desktop_environment_unittest.cc
+++ b/remoting/host/ipc_desktop_environment_unittest.cc
@@ -367,11 +367,10 @@ void IpcDesktopEnvironmentTest::CreateDesktopProcess() {
 
   // Create the daemon end of the daemon-to-desktop channel.
   desktop_channel_name_ = IPC::Channel::GenerateUniqueRandomChannelID();
-  desktop_channel_.reset(
-      new IPC::ChannelProxy(IPC::ChannelHandle(desktop_channel_name_),
-                            IPC::Channel::MODE_SERVER,
-                            &desktop_listener_,
-                            io_task_runner_.get()));
+  desktop_channel_ = IPC::ChannelProxy::CreateServer(
+      IPC::ChannelHandle(desktop_channel_name_),
+      &desktop_listener_,
+      io_task_runner_.get());
 
   // Create and start the desktop process.
   desktop_process_.reset(new DesktopProcess(task_runner_,