Convert the utility process JSON parser into a Mojo service.

components/safe_json/utility/BUILD.gn

Index: components/safe_json/utility/BUILD.gn
diff --git a/chromecast/service/BUILD.gn b/components/safe_json/utility/BUILD.gn
similarity index 59%
copy from chromecast/service/BUILD.gn
copy to components/safe_json/utility/BUILD.gn
index 5334998c2bad5257a8fa47f01bb9e62289d1656a..15dd59b04654735e1d6ea10390f3f8b51358ae97 100644
--- a/chromecast/service/BUILD.gn
+++ b/components/safe_json/utility/BUILD.gn
@@ -2,13 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("service") {
+source_set("utility") {
   sources = [
-    "cast_service.cc",
-    "cast_service.h",
+    "safe_json_parser_mojo_impl.cc",
+    "safe_json_parser_mojo_impl.h",
   ]
 
   deps = [
     "//base",
+    "//components/safe_json/public/interfaces",
   ]
 }