Run jshint over all JavaScript files

ports/gdb/tests/gdb_background_test.js

 /*
  * Copyright (c) 2014 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+/* globals ASSERT_EQ, ASSERT_LE, ASSERT_GE, EXPECT_EQ, TEST_F, TEST */
+/* globals chrometest, TestModuleTest, waitForExtraModuleCount */
+/* globals waitIgnoringTerminal */
+
 'use strict';
 
 function GdbExtensionTestModuleTest() {
   TestModuleTest.call(this);
   this.gdbExt = null;
 }
 GdbExtensionTestModuleTest.prototype = new TestModuleTest();
 
 GdbExtensionTestModuleTest.prototype.setUp = function() {
   var self = this;
@@ skipping 101 matching lines @@
 };
 
 /**
  * Wait for expected writes from gdb.
  * @param {Array.String} writes A list of writes to expect from GDB.
  * @return {Promise} A promise to wait.
  */
 GdbExtensionTestModuleTest.prototype.waitForGdbReply = function(lines) {
   var self = this;
   function checkLine() {
-    if (lines.length == 0) {
+    if (lines.length === 0) {
       return;
     }
     return Promise.resolve().then(function() {
       return self.gdbExt.wait();
     }).then(function(msg) {
       ASSERT_EQ('message', msg.name, 'expecting a message');
       var prefix = msg.data.slice(0, 3);
       var data = msg.data.slice(3);
       EXPECT_EQ('gdb', prefix, 'expected gdb term message');
       EXPECT_EQ(lines[0], data, 'expect matching line');
@@ skipping 200 matching lines @@
     return chrometest.proxyExtension('Native Client GDB');
   }).then(function(gdbExt) {
     self.gdbExt = gdbExt;
     self.gdbExt.postMessage({name: 'installCheck'});
     return self.gdbExt.wait();
   }).then(function(msg) {
     EXPECT_EQ('installCheckReply', msg.name, 'we are installed');
     self.gdbExt.disconnect();
   });
 });