Include the AppData file for Chrome and Chromium

chrome/installer/linux/common/installer.include

 # Recursively replace @@include@@ template variables with the referenced file,
 # and write the resulting text to stdout.
 process_template_includes() {
   INCSTACK+="$1->"
   # Includes are relative to the file that does the include.
   INCDIR=$(dirname $1)
   # Clear IFS so 'read' doesn't trim whitespace
   local OLDIFS="$IFS"
   IFS=''
   while read -r LINE
@@ skipping 69 matching lines @@
     -e "s#@@SXS_USER_DATA_DIR@@#${SXS_USER_DATA_DIR:-}#g" \
     -e "s#@@USR_BIN_SYMLINK_NAME@@#${USR_BIN_SYMLINK_NAME:-}#g" \
     > "$TMPLOUT" <<< "$TMPLINCL"
 )
 
 # Setup the installation directory hierachy in the package staging area.
 prep_staging_common() {
   install -m 755 -d "${STAGEDIR}/${INSTALLDIR}" \
     "${STAGEDIR}/usr/bin" \
     "${STAGEDIR}/usr/share/applications" \
+    "${STAGEDIR}/usr/share/appdata" \
     "${STAGEDIR}/usr/share/gnome-control-center/default-apps" \
     "${STAGEDIR}/usr/share/man/man1"
 }
 
 get_version_info() {
   source "${BUILDDIR}/installer/version.txt"
   VERSION="${MAJOR}.${MINOR}.${BUILD}.${PATCH}"
   # TODO(phajdan.jr): Provide a mechanism to pass a different package
   # release number if needed. The meaning of it is to bump it for
   # packaging-only changes while the underlying software has the same version.
@@ skipping 121 matching lines @@
 
   # app icons
   install -m 644 \
     "${BUILDDIR}/installer/theme/product_logo_"*.png \
     "${BUILDDIR}/installer/theme/product_logo_32.xpm" \
     "${STAGEDIR}/${INSTALLDIR}/"
 
   # desktop integration
   install -m 755 "${BUILDDIR}/xdg-mime" "${STAGEDIR}${INSTALLDIR}/"
   install -m 755 "${BUILDDIR}/xdg-settings" "${STAGEDIR}${INSTALLDIR}/"
+
+  if [ ${PACKAGE:0:6} = google ]; then
+    process_template "${BUILDDIR}/installer/common/google-chrome.appdata.xml.template" \
+      "${STAGEDIR}/usr/share/appdata/${PACKAGE}.appdata.xml"
+  else
+    process_template "${BUILDDIR}/installer/common/chromium-browser.appdata.xml.template" \
+      "${STAGEDIR}/usr/share/appdata/${PACKAGE}.appdata.xml"
+  fi
+  chmod 644 "${STAGEDIR}/usr/share/appdata/${PACKAGE}.appdata.xml"
+
   process_template "${BUILDDIR}/installer/common/desktop.template" \
     "${STAGEDIR}/usr/share/applications/${PACKAGE}.desktop"
   chmod 644 "${STAGEDIR}/usr/share/applications/${PACKAGE}.desktop"
   process_template "${BUILDDIR}/installer/common/default-app.template" \
     "${STAGEDIR}/usr/share/gnome-control-center/default-apps/${PACKAGE}.xml"
   chmod 644 "${STAGEDIR}/usr/share/gnome-control-center/default-apps/${PACKAGE}.xml"
   process_template "${BUILDDIR}/installer/common/default-app-block.template" \
     "${STAGEDIR}${INSTALLDIR}/default-app-block"
   chmod 644 "${STAGEDIR}${INSTALLDIR}/default-app-block"
 
   # documentation
   install -m 755 "${BUILDDIR}/${PROGNAME}.1" \
     "${STAGEDIR}/usr/share/man/man1/${PACKAGE}.1"
 }