Support relocatable RPM packages

chrome/installer/linux/common/symlinks.include

 NSS_FILES="libnspr4.so.0d libplds4.so.0d libplc4.so.0d libssl3.so.1d \
     libnss3.so.1d libsmime3.so.1d libnssutil3.so.1d"
 
 add_nss_symlinks() {
   get_lib_dir
   for f in $NSS_FILES
   do
     target=$(echo $f | sed 's/\.[01]d$//')
     if [ -f "/$LIBDIR/$target" ]; then
-      ln -snf "/$LIBDIR/$target" "@@INSTALLDIR@@/$f"
+      ln -snf "/$LIBDIR/$target" "${INSTALLDIR}/$f"
     elif [ -f "/usr/$LIBDIR/$target" ]; then
-      ln -snf "/usr/$LIBDIR/$target" "@@INSTALLDIR@@/$f"
+      ln -snf "/usr/$LIBDIR/$target" "${INSTALLDIR}/$f"
     else
       echo $f not found in "/$LIBDIR/$target" or "/usr/$LIBDIR/$target".
       exit 1
     fi
   done
 }
 
+add_chrome_symlinks() {
+  ln -snf "${INSTALLDIR}/@@PACKAGE@@" "/usr/bin/@@USR_BIN_SYMLINK_NAME@@"
+}
+
 remove_nss_symlinks() {
   for f in $NSS_FILES
   do
-    rm -rf "@@INSTALLDIR@@/$f"
+    rm -rf "${INSTALLDIR}/$f"
   done
 }
 
 remove_udev_symlinks() {
-  rm -rf "@@INSTALLDIR@@/libudev.so.0"
+  rm -rf "${INSTALLDIR}/libudev.so.0"
 }
+
+remove_chrome_symlinks() {
+  rm -rf "/usr/bin/@@USR_BIN_SYMLINK_NAME@@"
+}