Cancel scans when directory changed.

ui/file_manager/file_manager/common/js/importer_common.js

Index: ui/file_manager/file_manager/common/js/importer_common.js
diff --git a/ui/file_manager/file_manager/common/js/importer_common.js b/ui/file_manager/file_manager/common/js/importer_common.js
index 47e300c417dbe9d58bfe176f2904e287e3528dda..05387d8fe6ab6986b416fca8c2f4883b5519d916 100644
--- a/ui/file_manager/file_manager/common/js/importer_common.js
+++ b/ui/file_manager/file_manager/common/js/importer_common.js
@@ -344,7 +344,7 @@ importer.getMachineId = function() {
             if (id) {
               return id;
             }
-            var id = importer.generateMachineId_();
+            var id = importer.generateId();
             return storage.set(importer.Setting.MACHINE_ID, id)
                 .then(
                     function() {
@@ -377,11 +377,9 @@ importer.getDebugLogFilename = function(logId) {
 };
 
 /**
- * @return {number} A relatively unique six digit integer that is most likely
- *     unique to this machine among a user's machines. Used only to segregate
- *     log files on sync storage.
+ * @return {number} A relatively random six digit integer.
  */
-importer.generateMachineId_ = function() {
+importer.generateId = function() {
   return Math.floor(Math.random() * 899999) + 100000;
 };