Fix to bug 75303

ipc/ipc_channel_handle.h

 // Copyright (c) 2009 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 IPC_IPC_CHANNEL_HANDLE_H_
 #define IPC_IPC_CHANNEL_HANDLE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 12 matching lines @@
 //
 // In sum, when passing a handle to a channel over IPC, use this data structure
 // to work on both Windows and POSIX.
 
 namespace IPC {
 
 struct ChannelHandle {
   // Note that serialization for this object is defined in the ParamTraits
   // template specialization in ipc_message_utils.h.
   ChannelHandle() {}
+  // The name that is passed in should be an absolute path for Posix.
+  // Otherwise there may be a problem in IPC communication between
+  // processes with different working directories.
   ChannelHandle(const std::string& n) : name(n) {}
   ChannelHandle(const char* n) : name(n) {}
 #if defined(OS_POSIX)
   ChannelHandle(const std::string& n, const base::FileDescriptor& s)
       : name(n), socket(s) {}
 #endif  // defined(OS_POSIX)
 
   std::string name;
 #if defined(OS_POSIX)
   base::FileDescriptor socket;
 #endif  // defined(OS_POSIX)
 
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_HANDLE_H_