Bug 898125 - Add 'use strict'; and make changes accordingly [r=mbrubeck]

browser/metro/base/tests/mochiperf/browser_deck_01.js

@@ -1,6 +1,8 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
+"use strict";
+
 function test() {
   let testDir = gTestPath.substr(0, gTestPath.lastIndexOf("/"));
   Services.scriptloader.loadSubScript(testDir + "/perfhelpers.js", this);

browser/metro/base/tests/mochiperf/browser_firstx.js

@@ -1,6 +1,8 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
+"use strict";
+
 function test() {
   let testDir = gTestPath.substr(0, gTestPath.lastIndexOf("/"));
   Services.scriptloader.loadSubScript(testDir + "/perfhelpers.js", this);

browser/metro/base/tests/mochiperf/msgmanagerecho.js

@@ -6,6 +6,8 @@
  * TestEchoReceiver - receives json data, reserializes it and send it back.
  */ 
 
+"use strict";
+
 var TestEchoReceiver = {
   init: function init() {
     addMessageListener("Test:EchoRequest", this);

browser/metro/base/tests/mochiperf/perfhelpers.js

@@ -1,6 +1,8 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
+"use strict";
+
 // Misc. constants
 const kInfoHeader = "PERF-TEST | ";
 const kDeclareId = "DECLARE ";

browser/metro/base/tests/unit/test_util_extend.js

@@ -1,3 +1,5 @@
+"use strict";
+
 load('Util.js');
 
 function run_test() {