Reinstated onBlur handler and added images for CWS.

The onBlur handler was accidentally removed by my recent refactoring.
The images are required for submissions to CWS; only the icon needs to
included in the crx, however.

Review URL: https://codereview.chromium.org/868663007

Cr-Commit-Position: refs/heads/master@{#314961}

remoting/remoting_key_tester.gypi

@@ -35,6 +35,7 @@
                 'tools/javascript_key_tester/main.css',
                 'tools/javascript_key_tester/main.html',
                 'tools/javascript_key_tester/manifest.json',
+                'tools/javascript_key_tester/icon_128.png',
                 'tools/javascript_key_tester/pnacl/remoting_key_tester.nmf',
                 '<(PRODUCT_DIR)/remoting_key_tester_newlib.pexe',
               ],

remoting/tools/javascript_key_tester/event_listeners.js

@@ -36,7 +36,8 @@ var EventListeners = function(jsLog, pnaclLog, textLog,
   this.onKeyUpHandler_ = this.onKeyUp_.bind(this);
   this.onKeyPressHandler_ = this.onKeyPress_.bind(this);
   this.onMessageHandler_ = this.onMessage_.bind(this);
-  this.onBlurHandler_ = this.onBlur_.bind(this);
+  this.onPluginBlurHandler_ = this.onPluginBlur_.bind(this);
+  this.onWindowBlurHandler_ = this.onWindowBlur_.bind(this);
 
   this.jsChordTracker_ = new ChordTracker(jsLog);
   this.pnaclChordTracker_ = new ChordTracker(pnaclLog);
@@ -48,24 +49,27 @@ var EventListeners = function(jsLog, pnaclLog, textLog,
  * Start listening for keyboard events.
  */
 EventListeners.prototype.activate = function() {
+  window.addEventListener('blur', this.onWindowBlurHandler_, false);
   document.body.addEventListener('keydown', this.onKeyDownHandler_, false);
   document.body.addEventListener('keyup', this.onKeyUpHandler_, false);
   document.body.addEventListener('keypress', this.onKeyPressHandler_, false);
   this.pnaclListener_.addEventListener('message', this.onMessageHandler_, true);
-  this.pnaclPlugin_.addEventListener('blur', this.onBlurHandler_, false);
-  this.onBlur_();
+  this.pnaclPlugin_.addEventListener('blur', this.onPluginBlurHandler_, false);
+  this.onPluginBlur_();
 };
 
 /**
  * Stop listening for keyboard events.
  */
 EventListeners.prototype.deactivate = function() {
+  window.removeEventListener('blur', this.onWindowBlurHandler_, false);
   document.body.removeEventListener('keydown', this.onKeyDownHandler_, false);
   document.body.removeEventListener('keyup', this.onKeyUpHandler_, false);
   document.body.removeEventListener('keypress', this.onKeyPressHandler_, false);
   this.pnaclListener_.removeEventListener(
       'message', this.onMessageHandler_, true);
-  this.pnaclPlugin_.removeEventListener('blur', this.onBlurHandler_, false);
+  this.pnaclPlugin_.removeEventListener(
+      'blur', this.onPluginBlurHandler_, false);
 };
 
 /**
@@ -122,10 +126,18 @@ EventListeners.prototype.onMessage_ = function (event) {
 /**
  * @return {void}
  */
-EventListeners.prototype.onBlur_ = function() {
+EventListeners.prototype.onPluginBlur_ = function() {
   this.pnaclPlugin_.focus();
 };
 
+/**
+ * @return {void}
+ */
+EventListeners.prototype.onWindowBlur_ = function() {
+  this.jsChordTracker_.releaseAllKeys();
+  this.pnaclChordTracker_.releaseAllKeys();
+};
+
 /**
  * @param {string} str
  * @private

remoting/tools/javascript_key_tester/manifest.json

@@ -2,6 +2,9 @@
   "name": "Javascript key event tester",
   "version": "1.1",
   "manifest_version": 2,
+  "icons": {
+    "128": "icon_128.png"
+  },
   "app": {
     "background": {
       "scripts": ["background.js"]