third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/js/jasmine.json

Index: third_party/protobuf/js/jasmine.json
diff --git a/third_party/protobuf/js/jasmine.json b/third_party/protobuf/js/jasmine.json
index f83c54c09d35dc336fe982be65d9d1361d727014..093f15794f71b71406c611706975bfd569b8c34f 100644
--- a/third_party/protobuf/js/jasmine.json
+++ b/third_party/protobuf/js/jasmine.json
@@ -7,6 +7,9 @@
     "helpers": [
         "node_modules/google-closure-library/closure/goog/bootstrap/nodejs.js",
         "node_loader.js",
-        "deps.js"
+        "deps.js",
+        "google/protobuf/any.js",
+        "google/protobuf/struct.js",
+        "google/protobuf/timestamp.js"
     ]
 }