Prevent premature 'scan-completed' events in local search.

BUG=
TEST=


Review URL: https://chromiumcodereview.appspot.com/10828091

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149174 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -533,8 +533,7 @@ DirectoryContentsLocalSearch.prototype.scanDirectory_ = function(entry) {
 };
 
 /**
- * Empty.
+ * We get results for each directory in one go in scanDirectory_.
  */
 DirectoryContentsLocalSearch.prototype.readNextChunk = function() {
-  this.onCompleted();
 };