Fix all type errors in image_loader.

ui/file_manager/image_loader/image_loader.js

Index: ui/file_manager/image_loader/image_loader.js
diff --git a/ui/file_manager/image_loader/image_loader.js b/ui/file_manager/image_loader/image_loader.js
index a23c0e671f2bd3697bfda73928b42c4c92dadab9..e45c084a5ec6e2766ab80330ad5ed0f6f7fe308f 100644
--- a/ui/file_manager/image_loader/image_loader.js
+++ b/ui/file_manager/image_loader/image_loader.js
@@ -34,7 +34,9 @@ function ImageLoader() {
       });
       return requestPromise;
     });
-    initPromises.push(new Promise(this.cache_.initialize.bind(this.cache_)));
+    initPromises.push(new Promise(function(resolve, reject) {

[fukino, 2014/10/07 09:52:44]

The executor function which is given to Promise constructor needs two arguments
(according to
http://people.mozilla.org/~jorendorff/es6-draft.html#sec-promise-executor), so I
rewrote like this.

+      this.cache_.initialize(resolve);
+    }.bind(this)));
 
     // After all initialization promises are done, start the scheduler.
     Promise.all(initPromises).then(this.scheduler_.start.bind(this.scheduler_));
@@ -50,7 +52,7 @@ function ImageLoader() {
   }.bind(this));
 
   // Listen for incoming requests.
-  chrome.extension.onMessageExternal.addListener(
+  chrome.runtime.onMessageExternal.addListener(
       function(request, sender, sendResponse) {
         if (ImageLoader.ALLOWED_CLIENTS.indexOf(sender.id) !== -1) {
           // Sending a response may fail if the receiver already went offline.
@@ -63,7 +65,9 @@ function ImageLoader() {
               // Ignore the error.
             }
           };
-          return this.onMessage_(sender.id, request, failSafeSendResponse);
+          return this.onMessage_(sender.id,
+                                 /** @type {LoadImageRequest} */ (request),
+                                 failSafeSendResponse);
         }
       }.bind(this));
 }
@@ -84,7 +88,7 @@ ImageLoader.ALLOWED_CLIENTS = [
  * an image task.
  *
  * @param {string} senderId Sender's extension id.
- * @param {Object} request Request message as a hash array.
+ * @param {LoadImageRequest} request Request message as a hash array.
  * @param {function(Object)} callback Callback to be called to return response.
  * @return {boolean} True if the message channel should stay alive until the
  *     callback is called.