WIP Chromite supporting "LEGACY" mode, as requested by Anush.

chromite/specs/chroot/chroot.spec

Index: chromite/specs/chroot/chroot.spec
diff --git a/chromite/specs/chroot/chroot.spec b/chromite/specs/chroot/chroot.spec
new file mode 100644
index 0000000000000000000000000000000000000000..faed27a0da5734b30184d2c5b10d1930eb84dbeb
--- /dev/null
+++ b/chromite/specs/chroot/chroot.spec
@@ -0,0 +1,23 @@
+# chromite chroot spec file
+# Use RFC 822 format
+
+[LEGACY_CHROOT]
+
+# The path to the chroot.  If relative, this is relative to the base of your
+# chromium source tree.  This is passed to make_chroot and enter_chroot as the
+# --chroot option.
+#
+# DEFAULT: the name of this spec file, without the suffix
+#path: chroot
+
+
+# Flags to pass to make_chroot (other than --chroot).
+#
+# DEFAULT: nothing
+#make_chroot_flags:
+
+
+# Flags to pass to enter_chroot (other than --chroot).
+#
+# DEFAULT: nothing
+#enter_chroot_flags: