libchrome: Several upstreamable fixes from libchrome

base/third_party/nspr/prtime.cc

 /* Portions are Copyright (C) 2011 Google Inc */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
@@ skipping 361 matching lines @@
  *
  * PR_GMTParameters --
  *
  *     Returns the PRTimeParameters for Greenwich Mean Time.
  *     Trivially, both the tp_gmt_offset and tp_dst_offset fields are 0.
  *
  *------------------------------------------------------------------------
  */
 
 PRTimeParameters
-PR_GMTParameters(const PRExplodedTime *gmt)
+PR_GMTParameters(const PRExplodedTime* /*gmt*/)
 {
     PRTimeParameters retVal = { 0, 0 };
     return retVal;
 }
 
 /*
  * The following code implements PR_ParseTimeString().  It is based on
  * ns/lib/xp/xp_time.c, revision 1.25, by Jamie Zawinski <jwz@netscape.com>.
  */
 
@@ skipping 784 matching lines @@
                               + 60 * localTime.tm_hour
                               + 1440 * (localTime.tm_mday - 2);
         }
 
   result->tm_params.tp_gmt_offset = zone_offset * 60;
   result->tm_params.tp_dst_offset = dst_offset * 60;
 
   *result_imploded = PR_ImplodeTime(result);
   return PR_SUCCESS;
 }