Make checkdeps.py check third_party/mojo and third_party/mojo_services.

third_party/mojo_services/DEPS

Index: third_party/mojo_services/DEPS
diff --git a/third_party/mojo_services/DEPS b/third_party/mojo_services/DEPS
new file mode 100644
index 0000000000000000000000000000000000000000..d715b1f5a25e3ebf3d72f0fe35d538f3ea9d3a3e
--- /dev/null
+++ b/third_party/mojo_services/DEPS
@@ -0,0 +1,20 @@
+include_rules = [
+  # This code is checked into the chromium repo so it's fine to depend on this.
+  "+base",
+  "+testing",
+  "+mojo",
+
+  # internal includes.
+  "+geometry",
+  "+input_events",
+  "+surfaces",
+  "+native_viewport",
+  "+view_manager",
+  "+window_manager",
+]
+
+specific_include_rules = {
+  "view_manager_test_suite\.cc": [
+    "+ui/gfx/x/x11_connection.h",
+  ],
+}