Files.app: Add analytics code to instrument cloud import flows.

ui/file_manager/file_manager/background/js/media_import_handler_unittest.js

Index: ui/file_manager/file_manager/background/js/media_import_handler_unittest.js
diff --git a/ui/file_manager/file_manager/background/js/media_import_handler_unittest.js b/ui/file_manager/file_manager/background/js/media_import_handler_unittest.js
index 7d0747f0cf36a6adc4d930b4f2e9e4853b394df7..f58e91e774423943b1eab17035f1017b8911ac96 100644
--- a/ui/file_manager/file_manager/background/js/media_import_handler_unittest.js
+++ b/ui/file_manager/file_manager/background/js/media_import_handler_unittest.js
@@ -23,8 +23,8 @@ var mockCopier;
 /** @type {!MockFileSystem} */
 var destinationFileSystem;
 
-/** @type {!importer.DuplicateFinder} */
-var duplicateFinder;
+/** @type {!importer.TestDuplicateFinder.Factory} */
+var duplicateFinderFactory;
 
 // Set up string assets.
 loadTimeData.data = {
@@ -55,10 +55,13 @@ function setUp() {
   importHistory = new importer.TestImportHistory();
   mediaScanner = new TestMediaScanner();
   destinationFileSystem = new MockFileSystem(destinationFactory);
-  duplicateFinder = new importer.TestDuplicateFinder();
+  duplicateFinderFactory = new importer.TestDuplicateFinder.Factory();
 
   mediaImporter = new importer.MediaImportHandler(
-      progressCenter, importHistory, duplicateFinder);
+      progressCenter,
+      importHistory,
+      duplicateFinderFactory,
+      new TestTracker());
 }
 
 function testImportMedia(callback) {
@@ -252,7 +255,7 @@ function testImportWithDuplicates(callback) {
         importer.MediaImportHandler.ImportTask.UpdateType.ENTRY_CHANGED) {
       copyCount++;
       if (copyCount === EXPECTED_COPY_COUNT) {
-        duplicateFinder.returnValue = true;
+        duplicateFinderFactory.instances[0].returnValue = true;
       }
     }
   });