Merge to XFA: Make checkdeps --resolve-dotdot succeed.

This is just a straight-forward, partial merge. It does not
actually make checkdeps succeed.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1419373005 .

(cherry picked from commit 79f5a32175293620abe456554e10efb7c3f4e7c6)

Review URL: https://codereview.chromium.org/1409153007 .
diff --git a/public/DEPS b/public/DEPS
new file mode 100644
index 0000000..d0005ca
--- /dev/null
+++ b/public/DEPS
@@ -0,0 +1,8 @@
+include_rules = [
+  # public/ needs to be standalone. Explicitly disallow everything.
+  '-core',
+  '-fpdfsdk',
+  '-testing',
+  '-third_party',
+  '-v8',
+]