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

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

Index: ui/file_manager/file_manager/foreground/js/file_manager.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_manager.js b/ui/file_manager/file_manager/foreground/js/file_manager.js
index 37ac23c8d1c3e4e6ebbea662207bbc7690da5031..0ab09a0dd00d6438c869f7da75959809f586d4ca 100644
--- a/ui/file_manager/file_manager/foreground/js/file_manager.js
+++ b/ui/file_manager/file_manager/foreground/js/file_manager.js
@@ -126,6 +126,11 @@ function FileManager() {
    */
   this.ui_ = null;
 
+  /**
+   * @private {analytics.Tracker}
+   */
+  this.tracker_ = null;
+
   // --------------------------------------------------------------------------
   // Parameters determining the type of file manager.
 
@@ -452,7 +457,8 @@ FileManager.prototype = /** @struct */ {
                     this.mediaScanner_),
                 /** @type {!importer.ImportRunner} */ (
                     this.mediaImportHandler_),
-                new importer.RuntimeCommandWidget());
+                new importer.RuntimeCommandWidget(),
+                this.tracker_);
           }
         }.bind(this));
 
@@ -652,6 +658,7 @@ FileManager.prototype = /** @struct */ {
             this.mediaScanner_ =
                 this.backgroundPage_.background.mediaScanner;
             this.historyLoader_ = this.backgroundPage_.background.historyLoader;
+            this.tracker_ = this.backgroundPage_.background.tracker;
             callback();
           }.bind(this));
         }.bind(this)));