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

components/nacl/browser/nacl_process_host.cc

Index: components/nacl/browser/nacl_process_host.cc
diff --git a/components/nacl/browser/nacl_process_host.cc b/components/nacl/browser/nacl_process_host.cc
index 7451fe610e269597601947c34a5e31295694188f..ce2700de6dfb77fbdb5f589ccdfb5e0add5cde1e 100644
--- a/components/nacl/browser/nacl_process_host.cc
+++ b/components/nacl/browser/nacl_process_host.cc
@@ -905,11 +905,10 @@ void NaClProcessHost::OnPpapiChannelsCreated(
   if (!ipc_proxy_channel_.get()) {
     DCHECK_EQ(PROCESS_TYPE_NACL_LOADER, process_->GetData().process_type);
 
-    ipc_proxy_channel_.reset(
-        new IPC::ChannelProxy(browser_channel_handle,
-                              IPC::Channel::MODE_CLIENT,
-                              NULL,
-                              base::MessageLoopProxy::current().get()));
+    ipc_proxy_channel_ = IPC::ChannelProxy::CreateClient(
+        browser_channel_handle,
+        NULL,
+        base::MessageLoopProxy::current().get());
     // Create the browser ppapi host and enable PPAPI message dispatching to the
     // browser process.
     ppapi_host_.reset(content::BrowserPpapiHost::CreateExternalPluginProcess(