Add libav-tools to install-build-deps.sh.

build/install-build-deps.sh

 #!/bin/bash -e
 
 # Copyright (c) 2012 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 79 matching lines @@
   echo
 fi
 
 # Packages needed for chromeos only
 chromeos_dev_list="libbluetooth-dev"
 
 # Packages needed for development
 dev_list="apache2.2-bin bison curl dpkg-dev elfutils devscripts fakeroot flex
           fonts-thai-tlwg g++ git-core gperf language-pack-da language-pack-fr
           language-pack-he language-pack-zh-hant libapache2-mod-php5
-          libasound2-dev libbrlapi-dev libbz2-dev libcairo2-dev libcap-dev
-          libcups2-dev libcurl4-gnutls-dev libdrm-dev libelf-dev libexif-dev
-          libgconf2-dev libgl1-mesa-dev libglib2.0-dev libglu1-mesa-dev
-          libgnome-keyring-dev libgtk2.0-dev libkrb5-dev libnspr4-dev
-          libnss3-dev libpam0g-dev libpci-dev libpulse-dev libsctp-dev
-          libspeechd-dev libsqlite3-dev libssl-dev libudev-dev libwww-perl
-          libxslt1-dev libxss-dev libxt-dev libxtst-dev mesa-common-dev openbox
-          patch perl php5-cgi pkg-config python python-cherrypy3 python-dev
-          python-psutil rpm ruby subversion ttf-dejavu-core ttf-indic-fonts
-          ttf-kochi-gothic ttf-kochi-mincho wdiff xfonts-mathml zip
-          $chromeos_dev_list"
+          libasound2-dev libbrlapi-dev libav-tools libbz2-dev libcairo2-dev
+          libcap-dev libcups2-dev libcurl4-gnutls-dev libdrm-dev libelf-dev
+          libexif-dev libgconf2-dev libgl1-mesa-dev libglib2.0-dev
+          libglu1-mesa-dev libgnome-keyring-dev libgtk2.0-dev libkrb5-dev
+          libnspr4-dev libnss3-dev libpam0g-dev libpci-dev libpulse-dev
+          libsctp-dev libspeechd-dev libsqlite3-dev libssl-dev libudev-dev
+          libwww-perl libxslt1-dev libxss-dev libxt-dev libxtst-dev
+          mesa-common-dev openbox patch perl php5-cgi pkg-config python
+          python-cherrypy3 python-dev python-psutil rpm ruby subversion
+          ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic ttf-kochi-mincho
+          wdiff xfonts-mathml zip $chromeos_dev_list"
 
 # 64-bit systems need a minimum set of 32-bit compat packages for the pre-built
 # NaCl binaries. These are always needed, regardless of whether or not we want
 # the full 32-bit "cross-compile" support (--lib32).
 if file /sbin/init | grep -q 'ELF 64-bit'; then
   dev_list="${dev_list} libc6-i386 lib32gcc1 lib32stdc++6"
 fi
 
 # Run-time libraries required by chromeos only
 chromeos_lib_list="libpulse0 libbz2-1.0"
@@ skipping 489 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