[FileBrowser] Fixed gdata space info in nested folders.

BUG=140887


Review URL: https://chromiumcodereview.appspot.com/10855124

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151255 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/js/file_manager.js

@@ -4146,7 +4146,7 @@ FileManager.prototype = {
     this.updateCommands_();
     this.gdataSpaceInfoBar_.setAttribute('pending', '');
     chrome.fileBrowserPrivate.getSizeStats(
-        this.directoryModel_.getCurrentDirEntry().toURL(), function(result) {
+        this.directoryModel_.getCurrentRootUrl(), function(result) {
           if (!chrome.extension.lastError) {
             this.gdataSpaceInfoBar_.removeAttribute('pending');