Mojo: Remove ProxyMessagePipeEndpoint::OnRemove(), etc.

mojo/system/proxy_message_pipe_endpoint.cc

Index: mojo/system/proxy_message_pipe_endpoint.cc
diff --git a/mojo/system/proxy_message_pipe_endpoint.cc b/mojo/system/proxy_message_pipe_endpoint.cc
index ff8beb808348b86c661397cab41ed8d5c4818d85..a14fa965b136a6e6ae68a2a1bc4e1b3cc6f02f5a 100644
--- a/mojo/system/proxy_message_pipe_endpoint.cc
+++ b/mojo/system/proxy_message_pipe_endpoint.cc
@@ -20,7 +20,7 @@ ProxyMessagePipeEndpoint::ProxyMessagePipeEndpoint(
 }
 
 ProxyMessagePipeEndpoint::~ProxyMessagePipeEndpoint() {
-  DCHECK(!is_attached());
+  channel_endpoint_->DetachFromMessagePipe();
 }
 
 MessagePipeEndpoint::Type ProxyMessagePipeEndpoint::GetType() const {
@@ -28,9 +28,6 @@ MessagePipeEndpoint::Type ProxyMessagePipeEndpoint::GetType() const {
 }
 
 bool ProxyMessagePipeEndpoint::OnPeerClose() {
-  if (is_attached())
-    Detach();
-
   return false;
 }
 
@@ -44,16 +41,5 @@ void ProxyMessagePipeEndpoint::EnqueueMessage(
       << "Failed to write enqueue message to channel";
 }
 
-void ProxyMessagePipeEndpoint::OnRemove() {
-  Detach();
-}
-
-void ProxyMessagePipeEndpoint::Detach() {
-  DCHECK(is_attached());
-
-  channel_endpoint_->DetachFromMessagePipe();
-  channel_endpoint_ = nullptr;
-}
-
 }  // namespace system
 }  // namespace mojo