Add support for UserIdleTime to Linux.

build/install-build-deps.sh

 #!/bin/bash -e
 
 # 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.
 
 # Script to install everything needed to build chromium (well, ideally, anyway)
 # See http://code.google.com/p/chromium/wiki/LinuxBuildInstructions
 # and http://code.google.com/p/chromium/wiki/LinuxBuild64Bit
 
@@ skipping 119 matching lines @@
   echo "Running as non-root user."
   echo "You might have to enter your password one or more times for 'sudo'."
   echo
 fi
 
 # Packages need for development
 dev_list="apache2 bison fakeroot flex g++ g++-multilib gperf libapache2-mod-php5
           libasound2-dev libbz2-dev libcairo2-dev libgconf2-dev libgl1-mesa-dev
           libglu1-mesa-dev libglib2.0-dev libgtk2.0-dev libjpeg62-dev
           libnspr4-dev libnss3-dev libpam0g-dev libsqlite3-dev libxslt1-dev
-          lighttpd mesa-common-dev msttcorefonts patch perl php5-cgi pkg-config
-          python rpm subversion wdiff"
+          libxss-dev lighttpd mesa-common-dev msttcorefonts patch perl php5-cgi
+          pkg-config python rpm subversion wdiff"
 
 # Full list of required run-time libraries
 lib_list="libatk1.0-0 libc6 libasound2 libcairo2 libexpat1
           libfontconfig1 libfreetype6 libglib2.0-0 libgtk2.0-0 libnspr4-0d
           libnss3-1d libpango1.0-0 libpcre3 libpixman-1-0 libpng12-0 libstdc++6
           libsqlite3-0 libx11-6 libxau6 libxcb1 libxcomposite1
           libxcursor1 libxdamage1 libxdmcp6 libxext6 libxfixes3 libxi6
           libxinerama1 libxrandr2 libxrender1 zlib1g"
 
 # Debugging symbols for all of the run-time libraries
@@ skipping 279 matching lines @@
              sed -e 's/[.]so[.][0-9].*/.so/' |
              sort -u); do
     [ "x${i##*/}" = "xld-linux.so" ] && continue
     [ -r "$i" ] && continue
     j="$(ls "$i."* | sed -e 's/.*[.]so[.]\([^.]*\)$/\1/;t;d' |
          sort -n | tail -n 1)"
     [ -r "$i.$j" ] || continue
     sudo ln -s "${i##*/}.$j" "$i"
   done
 fi