Pure pedantry: Replace all ".size() == 0" with ".empty()".

ipc/ipc_channel_posix.cc

 // Copyright (c) 2010 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 "ipc/ipc_channel_posix.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <sys/types.h>
@@ skipping 68 matching lines @@
 // this scheme.
 
 class PipeMap {
  public:
   static PipeMap* GetInstance() {
     return Singleton<PipeMap>::get();
   }
 
   ~PipeMap() {
     // Shouldn't have left over pipes.
-    DCHECK(map_.size() == 0);
+    DCHECK(map_.empty());
   }
 
   // Lookup a given channel id. Return -1 if not found.
   int Lookup(const std::string& channel_id) {
     base::AutoLock locked(lock_);
 
     ChannelToFDMap::const_iterator i = map_.find(channel_id);
     if (i == map_.end())
       return -1;
     return i->second;
@@ skipping 1056 matching lines @@
 
 bool Channel::HasAcceptedConnection() const {
   return channel_impl_->HasAcceptedConnection();
 }
 
 void Channel::ResetToAcceptingConnectionState() {
   channel_impl_->ResetToAcceptingConnectionState();
 }
 
 }  // namespace IPC