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

ui/file_manager/file_manager/foreground/js/import_controller.js

Index: ui/file_manager/file_manager/foreground/js/import_controller.js
diff --git a/ui/file_manager/file_manager/foreground/js/import_controller.js b/ui/file_manager/file_manager/foreground/js/import_controller.js
index 3a62578beb0205e59c2a5b54ed2447706ee4136f..6825c30ee7f5b2f9aabd7b5920a0d4177a236d56 100644
--- a/ui/file_manager/file_manager/foreground/js/import_controller.js
+++ b/ui/file_manager/file_manager/foreground/js/import_controller.js
@@ -28,9 +28,10 @@ importer.ActivityState = {
  * @param {!importer.MediaScanner} scanner
  * @param {!importer.ImportRunner} importRunner
  * @param {!importer.CommandWidget} commandWidget
+ * @param {!analytics.Tracker} tracker
  */
 importer.ImportController =
-    function(environment, scanner, importRunner, commandWidget) {
+    function(environment, scanner, importRunner, commandWidget, tracker) {
 
   /** @private {!importer.ControllerEnvironment} */
   this.environment_ = environment;
@@ -47,6 +48,9 @@ importer.ImportController =
   /** @type {!importer.ScanManager} */
   this.scanManager_ = new importer.ScanManager(environment, scanner);
 
+  /** @private {!analytics.Tracker} */
+  this.tracker_ = tracker;
+
   /**
    * The active import task, if any.
    * @private {?importer.TaskDetails_}
@@ -124,6 +128,10 @@ importer.ImportController.prototype.onScanEvent_ = function(event, scan) {
  * @private
  */
 importer.ImportController.prototype.onVolumeUnmounted_ = function(volumeId) {
+  if (this.activeImport_) {
+    this.activeImport_.task.requestCancel();
+    this.tracker_.send(metrics.ImportEvents.DEVICE_YANKED);
+  }
   this.scanManager_.reset();
   this.checkState_();
 };
@@ -212,6 +220,7 @@ importer.ImportController.prototype.onClick_ =
 importer.ImportController.prototype.execute = function() {
   console.assert(!this.activeImport_,
       'Cannot execute while an import task is already active.');
+  // TODO(kenobi): Record import button clicked.
 
   var scan = this.scanManager_.getActiveScan();
   assert(scan != null);
@@ -339,7 +348,7 @@ importer.ImportController.prototype.fitsInAvailableSpace_ =
         // storage in this calculation on the assumption that we
         // don't want to completely max out storage...even though
         // synced files will eventually be evicted from the cache.
-        return availableSpace > scanResult.getTotalBytes();
+        return availableSpace > scanResult.getStatistics().sizeBytes;
       });
 };