Linux: Drop support for obsolete Ubuntu versions from build/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 29 matching lines @@
   --no-chromeos-fonts)      do_inst_chromeos_fonts=0;;
   --no-prompt)              do_default=1
                             do_quietly="-qq --assume-yes"
     ;;
   --unsupported)            do_unsupported=1;;
   *) usage;;
   esac
   shift
 done
 
-ubuntu_versions="10\.04|10\.10|11\.04|11\.10|12\.04|12\.10|13\.04"
-ubuntu_codenames="lucid|maverick|natty|oneiric|precise|quantal|raring"
+ubuntu_versions="12\.04|12\.10|13\.04"
+ubuntu_codenames="precise|quantal|raring"
 ubuntu_issue="Ubuntu ($ubuntu_versions|$ubuntu_codenames)"
 # GCEL is an Ubuntu-derived VM image used on Google Compute Engine; /etc/issue
 # doesn't contain a version number so just trust that the user knows what
 # they're doing.
 gcel_issue="^GCEL"
 
 if [ 0 -eq "${do_unsupported-0}" ] ; then
   if ! egrep -q "($ubuntu_issue|$gcel_issue)" /etc/issue; then
-    echo "ERROR: Only Ubuntu 10.04 (lucid) through 13.04 (raring) are"\
+    echo "ERROR: Only Ubuntu 12.04 (precise) through 13.04 (raring) are"\
         "currently supported" >&2
     exit 1
   fi
 
   if ! uname -m | egrep -q "i686|x86_64"; then
     echo "Only x86 architectures are currently supported" >&2
     exit
   fi
 fi
 
@@ skipping 436 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