Mojo C++ bindings: introduce public associated-interface-related types.

mojo/public/cpp/bindings/lib/scoped_interface_endpoint_handle.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/cpp/bindings/lib/scoped_interface_endpoint_handle.h"
 
 #include "base/logging.h"
 #include "mojo/public/cpp/bindings/lib/multiplex_router.h"
 
 namespace mojo {
@@ skipping 17 matching lines @@
   other.id_ = kInvalidInterfaceId;
 }
 
 ScopedInterfaceEndpointHandle::~ScopedInterfaceEndpointHandle() {
   reset();
 }
 
 ScopedInterfaceEndpointHandle& ScopedInterfaceEndpointHandle::operator=(
     ScopedInterfaceEndpointHandle&& other) {
   reset();
-
-  id_ = other.id_;
-  is_local_ = other.is_local_;
-  router_.swap(other.router_);
-
-  other.id_ = kInvalidInterfaceId;
+  swap(other);
 
   return *this;
 }
 
 void ScopedInterfaceEndpointHandle::reset() {
   if (!IsValidInterfaceId(id_))
     return;
 
   router_->CloseEndpointHandle(id_, is_local_);
 
   id_ = kInvalidInterfaceId;
+  is_local_ = true;
   router_ = nullptr;
 }
 
 void ScopedInterfaceEndpointHandle::swap(ScopedInterfaceEndpointHandle& other) {
   using std::swap;
   swap(other.id_, id_);
   swap(other.is_local_, is_local_);
   swap(other.router_, router_);
 }
 
 InterfaceId ScopedInterfaceEndpointHandle::release() {
   InterfaceId result = id_;
 
   id_ = kInvalidInterfaceId;
+  is_local_ = true;
   router_ = nullptr;
 
   return result;
 }
 
 }  // namespace internal
 }  // namespace mojo