Add mojo struct traits for GURL so that it can be sent over mojoms.

url/DEPS

Index: url/DEPS
diff --git a/url/DEPS b/url/DEPS
index 9643291a465c3ae4531273519b20784f72f1df7c..c89ac323c59802af145509da6322dc973510a04f 100644
--- a/url/DEPS
+++ b/url/DEPS
@@ -10,4 +10,8 @@ specific_include_rules = {
   "url_canon_icu(\.cc|_unittest\.cc)": [
     "+third_party/icu",
   ],
+  "run_all_unittests\.cc": [
+    "+mojo/edk/embedder/embedder.h",
+    "+mojo/edk/test/scoped_ipc_support.h",
+  ],
 }