Revert 145000 - chromeos: Merge tools/cros.DEPS/DEPS into the main DEPS.

tools/cros.DEPS/DEPS

Index: tools/cros.DEPS/DEPS
===================================================================
--- tools/cros.DEPS/DEPS	(revision 145068)
+++ tools/cros.DEPS/DEPS	(working copy)
@@ -1,3 +1,13 @@
-# TODO(satorux): Remove this file after a month.
-print 'ERROR: src/tools/cros.DEPS/DEPS has been merged into src/DEPS.'
-print 'ERROR: Please remove cros.DEPS rule from your .gclient file.'
+# When adding a new dependency, please update the top-level .gitignore file
+# to list the dependency's destination directory.
+
+vars = {
+  "chromiumos_git": "http://git.chromium.org/chromiumos",
+}
+
+deps_os = {
+  "unix" : {
+    "src/third_party/cros_system_api":
+      Var("chromiumos_git") + "/platform/system_api.git@a6b76c4e",
+  }
+}