Update mojo sdk to rev f6c8ec07c01deebc13178d516225fd12695c3dc2

mojo/edk/system/proxy_message_pipe_endpoint.cc

Index: mojo/edk/system/proxy_message_pipe_endpoint.cc
diff --git a/mojo/edk/system/proxy_message_pipe_endpoint.cc b/mojo/edk/system/proxy_message_pipe_endpoint.cc
index 4a954d982bad83d544459e098b537b17ab8108a8..5f0f2e95353e88294a22425ef60b51f3be7624d0 100644
--- a/mojo/edk/system/proxy_message_pipe_endpoint.cc
+++ b/mojo/edk/system/proxy_message_pipe_endpoint.cc
@@ -20,7 +20,15 @@ ProxyMessagePipeEndpoint::ProxyMessagePipeEndpoint(
 }
 
 ProxyMessagePipeEndpoint::~ProxyMessagePipeEndpoint() {
-  DCHECK(!channel_endpoint_.get());
+  DCHECK(!channel_endpoint_);
+}
+
+scoped_refptr<ChannelEndpoint>
+ProxyMessagePipeEndpoint::ReleaseChannelEndpoint() {
+  DCHECK(channel_endpoint_);
+  scoped_refptr<ChannelEndpoint> rv;
+  rv.swap(channel_endpoint_);
+  return rv;
 }
 
 MessagePipeEndpoint::Type ProxyMessagePipeEndpoint::GetType() const {
@@ -37,7 +45,7 @@ bool ProxyMessagePipeEndpoint::OnPeerClose() {
 // This case is handled in |Run()| (which will call us).
 void ProxyMessagePipeEndpoint::EnqueueMessage(
     scoped_ptr<MessageInTransit> message) {
-  DCHECK(channel_endpoint_.get());
+  DCHECK(channel_endpoint_);
   LOG_IF(WARNING, !channel_endpoint_->EnqueueMessage(message.Pass()))
       << "Failed to write enqueue message to channel";
 }
@@ -47,7 +55,7 @@ void ProxyMessagePipeEndpoint::Close() {
 }
 
 void ProxyMessagePipeEndpoint::DetachIfNecessary() {
-  if (channel_endpoint_.get()) {
+  if (channel_endpoint_) {
     channel_endpoint_->DetachFromClient();
     channel_endpoint_ = nullptr;
   }