Add type annotations to caster.js.

BUG=444485
TEST=GYP_GENERATORS=ninja tools/gyp/gyp --depth . ui/file_manager/video_player/js/compiled_resources.gyp && ninja -C out/Default | grep "caster.js"

Review URL: https://codereview.chromium.org/823583005

Cr-Commit-Position: refs/heads/master@{#309623}

ui/file_manager/externs/chrome_cast.js

@@ -334,7 +334,8 @@ chrome.cast.Volume.prototype.muted;
 /**
  * @param {!chrome.cast.SessionRequest} sessionRequest
  * @param {function(!chrome.cast.Session)} sessionListener
- * @param {function(!chrome.cast.ReceiverAvailability)} receiverListener
+ * @param {function(!chrome.cast.ReceiverAvailability,Array.<Object>)}
+ *     receiverListener
  * @param {chrome.cast.AutoJoinPolicy=} opt_autoJoinPolicy
  * @param {chrome.cast.DefaultActionPolicy=} opt_defaultActionPolicy
  * @constructor

ui/file_manager/video_player/js/cast/caster.js

@@ -8,6 +8,10 @@
 // cast extension. This line prevents an exception on using localStorage.
 window.__defineGetter__('localStorage', function() { return {}; });
 
+/**
+ * @type {string}
+ * @const
+ */
 var APPLICATION_ID = '4CCB98DA';
 
 util.addPageLoadHandler(function() {
@@ -42,7 +46,7 @@ function initialize() {
  * in background before load. The cast API will load the cast SDK automatically.
  * The given callback is executes after the cast SDK extension is initialized.
  *
- * @param {function} callback Callback (executed asynchronously).
+ * @param {function()} callback Callback (executed asynchronously).
  * @param {boolean=} opt_secondTry Specify true if it's the second call after
  *     installation of Cast API extension.
  */
@@ -79,7 +83,7 @@ function loadCastAPI(callback, opt_secondTry) {
           console.info('Google Cast API extension installed.');
 
           // Loads API again.
-          setTimeout(loadCastAPI.bind(null, callback, true));
+          setTimeout(loadCastAPI.bind(null, callback, true), 0);
         }.wrap());
   }.wrap();
 
@@ -107,7 +111,7 @@ function onLoadCastExtension(callback, opt_installationOccured) {
           metrics.CAST_API_EXTENSION_STATUS.LOADED);
     }
 
-    setTimeout(callback);  // Runs asynchronously.
+    setTimeout(callback, 0);  // Runs asynchronously.
   };
 
   if(!chrome.cast || !chrome.cast.isAvailable) {
@@ -164,6 +168,9 @@ function initializeApi() {
 }
 
 /**
+ * Called when receiver availability is changed. This method is also called when
+ * initialization is completed.
+ *
  * @param {chrome.cast.ReceiverAvailability} availability Availability of casts.
  * @param {Array.<Object>} receivers List of casts.
  */

ui/file_manager/video_player/js/error_util.js

@@ -19,15 +19,14 @@ window.onerror = function() { window.JSErrorCount++; };
  *  - Capture the stack trace in case of error.
  *  - Bind this object
  *
- * @param {Object} thisObject Object to be used as this.
+ * @param {Object=} opt_thisObject Object to be used as this.
  * @param {...} var_args Arguments to be bound with the wrapped function.
  * @return {function} Wrapped function.
  */
-Function.prototype.wrap = function(thisObject, var_args) {
+Function.prototype.wrap = function(opt_thisObject, var_args) {
   var func = this;
   var liveStack = (new Error('Stack trace before async call')).stack;
-  if (thisObject === undefined)
-    thisObject = null;
+  var thisObject = opt_thisObject || null;
   var boundArguments = Array.prototype.slice.call(arguments, 1);
 
   return function wrappedCallback(var_args) {