Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598

third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc

Index: third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc
diff --git a/third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc b/third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc
index 9655f9cfb9f769de2499e9d2a82fc5f3ffa5b7e9..96302163d6e90d83b8a347a8796c703f948b40fb 100644
--- a/third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc
+++ b/third_party/mojo/src/mojo/edk/system/endpoint_relayer.cc
@@ -31,14 +31,14 @@
 }
 
 void EndpointRelayer::SetFilter(scoped_ptr<Filter> filter) {
-  MutexLocker locker(&mutex_);
+  base::AutoLock locker(lock_);
   filter_ = filter.Pass();
 }
 
 bool EndpointRelayer::OnReadMessage(unsigned port, MessageInTransit* message) {
   DCHECK(message);
 
-  MutexLocker locker(&mutex_);
+  base::AutoLock locker(lock_);
 
   // If we're no longer the client, then reject the message.
   if (!endpoints_[port])
@@ -59,7 +59,7 @@
 }
 
 void EndpointRelayer::OnDetachFromChannel(unsigned port) {
-  MutexLocker locker(&mutex_);
+  base::AutoLock locker(lock_);
 
   if (endpoints_[port]) {
     endpoints_[port]->DetachFromClient();