"typedef Foo Bar" -> "using Bar = Foo" in //mojo/edk/....

mojo/edk/system/channel.h

 // Copyright 2013 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.
 
 #ifndef MOJO_EDK_SYSTEM_CHANNEL_H_
 #define MOJO_EDK_SYSTEM_CHANNEL_H_
 
 #include <stdint.h>
 
 #include "base/containers/hash_tables.h"
@@ skipping 217 matching lines @@
   base::Lock lock_;  // Protects the members below.
 
   scoped_ptr<RawChannel> raw_channel_;
   bool is_running_;
   // Set when |WillShutdownSoon()| is called.
   bool is_shutting_down_;
 
   // Has a reference to us.
   ChannelManager* channel_manager_;
 
-  typedef base::hash_map<ChannelEndpointId, scoped_refptr<ChannelEndpoint>>
-      IdToEndpointMap;
+  using IdToEndpointMap =
+      base::hash_map<ChannelEndpointId, scoped_refptr<ChannelEndpoint>>;
   // Map from local IDs to endpoints. If the endpoint is null, this means that
   // we're just waiting for the remove ack before removing the entry.
   IdToEndpointMap local_id_to_endpoint_map_;
   // Note: The IDs generated by this should be checked for existence before use.
   LocalChannelEndpointIdGenerator local_id_generator_;
 
-  typedef base::hash_map<ChannelEndpointId, scoped_refptr<IncomingEndpoint>>
-      IdToIncomingEndpointMap;
+  using IdToIncomingEndpointMap =
+      base::hash_map<ChannelEndpointId, scoped_refptr<IncomingEndpoint>>;
   // Map from local IDs to incoming endpoints (i.e., those received inside other
   // messages, but not yet claimed via |DeserializeEndpoint()|).
   IdToIncomingEndpointMap incoming_endpoints_;
   // TODO(vtl): We need to keep track of remote IDs (so that we don't collide
   // if/when we wrap).
   RemoteChannelEndpointIdGenerator remote_id_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(Channel);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CHANNEL_H_