Files.app: Show error messages for the case the source file is not exists.

chrome/browser/resources/file_manager/common/js/util.js

Index: chrome/browser/resources/file_manager/common/js/util.js
diff --git a/chrome/browser/resources/file_manager/common/js/util.js b/chrome/browser/resources/file_manager/common/js/util.js
index afc29fabf76880fe322c7b0836f3eddb53122fc5..0eab9227c3248359e970485b847d080cda04b145 100644
--- a/chrome/browser/resources/file_manager/common/js/util.js
+++ b/chrome/browser/resources/file_manager/common/js/util.js
@@ -1150,9 +1150,12 @@ util.entriesToURLs = function(entries) {
  * @param {Array.<string>} urls Input array of URLs.
  * @param {function(Array.<Entry>)} callback Completion callback with array of
  *     Entries.

[yoshiki, 2014/02/14 10:24:11]

Please mention that the both errorCallback and callback are called in error.

Or can't we combine these 2 callbacks?

[hirono, 2014/02/14 10:42:37]

Let me combine the callbacks!

+ * @param {function(Array.<Entry>)} opt_errorCallback Error callback with array
+ *     of URLs failed to be resolved.
  */
-util.URLsToEntries = function(urls, callback) {
+util.URLsToEntries = function(urls, callback, opt_errorCallback) {
   var result = [];
+  var failureUrl = [];
   AsyncUtil.forEach(
       urls,
       function(forEachCallback, url) {
@@ -1162,11 +1165,14 @@ util.URLsToEntries = function(urls, callback) {
         }, function() {
           // Not an error. Possibly, the file is not accessible anymore.
           console.warn('Failed to resolve the file with url: ' + url + '.');
+          failureUrl.push(url);
           forEachCallback();
         });
       },
       function() {
         callback(result);
+        if (opt_errorCallback)
+          opt_errorCallback(failureUrl);
       });
 };