Moved the FakeGUIDService from test_passwords.js to head.js.

services/sync/tests/unit/head_first.js

@@ -260,3 +260,11 @@ function FakeFilesystemService(contents) {
     return [fakeStream];
   };
 };
+
+function FakeGUIDService() {
+  let latestGUID = 0;
+
+  Utils.makeGUID = function fake_makeGUID() {
+    return "fake-guid-" + latestGUID++;
+  };
+}

services/sync/tests/unit/test_passwords.js

@@ -116,14 +116,6 @@ var ffs = new FakeFilesystemService({});
 var fgs = new FakeGUIDService();
 var fakeLoginManager = new FakeLoginManager(__fakeLogins);
 
-function FakeGUIDService() {
-  let latestGUID = 0;
-
-  Utils.makeGUID = function fake_makeGUID() {
-    return "fake-guid-" + latestGUID++;
-  };
-}
-
 function FakeLoginManager(fakeLogins) {
   this.fakeLogins = fakeLogins;