Linux: Add a script to generate a Precise dpkg admin dir for use with official builds on Trusty.

build/linux/sysroot_scripts/sysroot-creator.sh

 # Copyright 2014 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.
 #
 # This script should not be run directly but sourced by the other
 # scripts (e.g. sysroot-creator-trusty.sh).  Its up to the parent scripts
 # to define certain environment variables: e.g.
 #  DISTRO=ubuntu
 #  DIST=trusty
 #  APT_REPO=http://archive.ubuntu.com/ubuntu
@@ skipping 789 matching lines @@
 #@
 #@    Regenerate the package lists for all architectures.
 UpdatePackageListsAll() {
   RunCommand UpdatePackageListsAmd64
   RunCommand UpdatePackageListsI386
   RunCommand UpdatePackageListsARM
   RunCommand UpdatePackageListsARM64
   RunCommand UpdatePackageListsMips
 }
 
+#@
+#@ ListPackagesI386
+#@
+#@    Lists all packages necessary to build chrome for i386
+ListPackagesI386() {
+  echo "${DEBIAN_PACKAGES} ${DEBIAN_PACKAGES_X86:=}" |
+    sed -e 's/^[[:space:]]*//' | sed '/^$/d' > "$1"
+}
+
+#@
+#@ ListPackagesAmd64
+#@
+#@    Lists all packages necessary to build chrome for amd64
+ListPackagesAmd64() {
+  echo "${DEBIAN_PACKAGES} ${DEBIAN_PACKAGES_AMD64:=}" |
+    sed -e 's/^[[:space:]]*//' | sed '/^$/d' > "$1"
+}
+
 RunCommand() {
   SetEnvironmentVariables "$1"
   SanityCheck
   "$@"
 }
 
 if [ $# -eq 0 ] ; then
   echo "ERROR: you must specify a mode on the commandline"
   echo
   Usage
   exit 1
 elif [ "$(type -t $1)" != "function" ]; then
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 else
   ChangeDirectory
   if echo $1 | grep -qs "All$"; then
     "$@"
   else
     RunCommand "$@"
   fi
 fi