A grab-bag of small improvements

ui/file_manager/file_manager/foreground/js/import_controller_unittest.js

Index: ui/file_manager/file_manager/foreground/js/import_controller_unittest.js
diff --git a/ui/file_manager/file_manager/foreground/js/import_controller_unittest.js b/ui/file_manager/file_manager/foreground/js/import_controller_unittest.js
index 7347b57a0102eec364bd25c386c5cc2e33723dd8..d78e0b9db5babc0e58f06651e06ad4197e9dd8d6 100644
--- a/ui/file_manager/file_manager/foreground/js/import_controller_unittest.js
+++ b/ui/file_manager/file_manager/foreground/js/import_controller_unittest.js
@@ -45,6 +45,8 @@ function setUp() {
     recordEnum: function() {}
   };
 
+  new MockChromeStorageAPI();
+
   widget = new importer.TestCommandWidget();
 
   volumeManager = new MockVolumeManager();
@@ -178,6 +180,7 @@ function testFinalizeScans_TriggersUpdate(callback) {
       new MockFileEntry(fileSystem, '/DCIM/photos0/IMG00001.jpg', {size: 0}));
 
   environment.directoryChangedListener_();  // initiates a scan.
+  widget.resetPromises();
   mediaScanner.finalizeScans();
 
   reportPromise(widget.updateResolver.promise, callback);
@@ -506,6 +509,12 @@ importer.TestCommandWidget.prototype.toggleDetails = function() {
   this.toggleDetailsResolver.resolve();
 };
 
+/** @override */
+importer.TestCommandWidget.prototype.setDetailsBannerVisible =
+    function(visible) {
+  // TODO(smckay)
+};
+
 /**
  * @param {!VolumeManagerCommon.VolumeType} volumeType
  * @param {string} volumeId