Add one more library, libgio-2.0. base_unittests won't link without it.

build/install-build-deps.sh

 #!/bin/sh
 # 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
 set -ex
 
 # Root can't access files on all filesystems, but /tmp should always be ok
 # (unless it's full).  
 DIR=`mktemp -d`
 cd $DIR
@@ skipping 51 matching lines @@
   download_deb pool/main/s/sqlite3 libsqlite3-0_3.4.2-2_i386.deb
 
   sudo rsync -v -a usr/lib/* /usr/lib32/
   sudo ldconfig
 
   # Make missing symlinks as described by 
   # https://bugs.launchpad.net/ubuntu/+source/ia32-libs/+bug/277772
   # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=492453 
   # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=497087
   cd /usr/lib32
-  for lib in gdk-x11-2.0 atk-1.0 gdk_pixbuf-2.0 \
+  for lib in gio-2.0 gdk-x11-2.0 atk-1.0 gdk_pixbuf-2.0 \
            pangocairo-1.0 pango-1.0 pangoft2-1.0 \
            gobject-2.0 gmodule-2.0 glib-2.0 gtk-x11-2.0; do
     sudo ln -s -f lib$lib.so.0 lib$lib.so
   done
   for lib in z fontconfig
   do
     sudo ln -s -f lib$lib.so.1 lib$lib.so
   done
   for lib in cairo
   do
@@ skipping 20 matching lines @@
 elif egrep -q "Ubuntu 8.04|Ubuntu 8.10" /etc/issue && test `uname -m` = x86_64
 then
   install_hardy_64
 else
   echo "Unsupported system"
   cleanup
   exit 1
 fi
 cleanup