Vectorize download shelf progress indicators

chrome/browser/ui/views/download/download_item_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // A ChromeView that implements one download on the Download shelf.
 // Each DownloadItemView contains an application icon, a text label
 // indicating the download's file name, a text label indicating the
 // download's status (such as the number of bytes downloaded so far)
 // and a button for canceling an in progress download, or opening
 // the completed download.
@@ skipping 246 matching lines @@
   // The tooltip.  Only displayed when not showing a warning dialog.
   base::string16 tooltip_text_;
 
   // The current state (normal, hot or pushed) of the body and drop-down.
   State body_state_;
   State drop_down_state_;
 
   // Mode of the download item view.
   Mode mode_;
 
-  // In degrees, for downloads with no known total size.
-  int progress_angle_;
+  // When download progress began animating. Used for downloads of unknown size.
+  base::TimeTicks progress_start_time_;
 
   // The left and right x coordinates of the drop-down button.
   int drop_down_x_left_;
   int drop_down_x_right_;
 
   // Used when we are showing the menu to show the drop-down as pressed.
   bool drop_down_pressed_;
 
   // The height of the box formed by the background images and its labels.
   int box_height_;
@@ skipping 64 matching lines @@
   scoped_ptr<extensions::ExperienceSamplingEvent> sampling_event_;
 
   // Method factory used to delay reenabling of the item when opening the
   // downloaded file.
   base::WeakPtrFactory<DownloadItemView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DOWNLOAD_DOWNLOAD_ITEM_VIEW_H__