Skip content duplication check at directory or selection scan.

ui/file_manager/file_manager/background/js/media_import_handler.js

Index: ui/file_manager/file_manager/background/js/media_import_handler.js
diff --git a/ui/file_manager/file_manager/background/js/media_import_handler.js b/ui/file_manager/file_manager/background/js/media_import_handler.js
index ba7fa01d114298d13c2d73537b01a0bef6d9fcf5..88f11e7eddacabdcd75593801d13a165503d739d 100644
--- a/ui/file_manager/file_manager/background/js/media_import_handler.js
+++ b/ui/file_manager/file_manager/background/js/media_import_handler.js
@@ -68,6 +68,31 @@ importer.MediaImportHandler.IMPORTS_TAG_KEY = 'cloud-import';
 // files start being imported.
 importer.MediaImportHandler.IMPORTS_TAG_VALUE = 'media';
 
+/**
+ * Updates notification item with content scan progress.
+ *
+ * @param {!importer.TaskQueue.Task} task
+ * @param {number} newFileCount number of new files found so far
+ * @param {number} progress progress of the scan
+ */
+importer.MediaImportHandler.prototype.updateContentScanProgress =
+    function(task, newFileCount, progress) {
+  var item = this.progressCenter_.getItemById(task.taskId);
+  if (!item) {
+    item = new ProgressCenterItem();
+    item.id = task.taskId;
+    item.type = ProgressItemType.COPY;
+    item.progressMax = 100;
+    item.cancelCallback = function() {
+      task.requestCancel();
+    };
+  }
+  item.message = strf('CLOUD_IMPORT_STATUS_PREPARING', newFileCount);
+  item.progressValue = progress;
+  item.state = ProgressItemState.PROGRESSING;
+  this.progressCenter_.updateItem(item);
+}
+
 /** @override */
 importer.MediaImportHandler.prototype.importFromScanResult =
     function(scanResult, destination, directoryPromise) {
@@ -80,6 +105,10 @@ importer.MediaImportHandler.prototype.importFromScanResult =
       destination,
       this.tracker_);
 
+  if (!scanResult.isFinal()) {
+    // TODO(yamaguchi): Update progress of the scan in progress event handler.
+    this.updateContentScanProgress(task, 0, 0);
+  }
   task.addObserver(this.onTaskProgress_.bind(this, task));
   task.addObserver(this.onFileImported_.bind(this, task));