Mojo: Add static factory functions to MessagePipe.

mojo/system/message_pipe.cc

Index: mojo/system/message_pipe.cc
diff --git a/mojo/system/message_pipe.cc b/mojo/system/message_pipe.cc
index 1b4ecfb8e59160d67d358cb367ce16a4a34baab3..13776d3d76558f6261f90bd964c1ad3dfa6190d4 100644
--- a/mojo/system/message_pipe.cc
+++ b/mojo/system/message_pipe.cc
@@ -21,9 +21,25 @@ MessagePipe::MessagePipe(scoped_ptr<MessagePipeEndpoint> endpoint0,
   endpoints_[1].reset(endpoint1.release());
 }
 
-MessagePipe::MessagePipe() {
-  endpoints_[0].reset(new LocalMessagePipeEndpoint());
-  endpoints_[1].reset(new LocalMessagePipeEndpoint());
+// static
+MessagePipe* MessagePipe::CreateLocalLocal() {
+  return new MessagePipe(
+      scoped_ptr<MessagePipeEndpoint>(new LocalMessagePipeEndpoint),
+      scoped_ptr<MessagePipeEndpoint>(new LocalMessagePipeEndpoint));
+}
+
+// static
+MessagePipe* MessagePipe::CreateLocalProxy() {
+  return new MessagePipe(
+      scoped_ptr<MessagePipeEndpoint>(new LocalMessagePipeEndpoint),
+      scoped_ptr<MessagePipeEndpoint>(new ProxyMessagePipeEndpoint));
+}
+
+// static
+MessagePipe* MessagePipe::CreateProxyLocal() {
+  return new MessagePipe(
+      scoped_ptr<MessagePipeEndpoint>(new ProxyMessagePipeEndpoint),
+      scoped_ptr<MessagePipeEndpoint>(new LocalMessagePipeEndpoint));
 }
 
 // static