Vectorize download shelf progress indicators

chrome/browser/ui/cocoa/download/download_item_cell.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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_CELL_H_
 #define CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_CELL_H_
 
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/gradient_button_cell.h"
 
 #include "base/files/file_path.h"
+#include "base/time/time.h"
 
 class DownloadItemModel;
 @class IndeterminateProgressTimer;
 
 // A button cell that implements the weird button/popup button hybrid that is
 // used by the download items.
 
 // The button represented by this cell consists of a button part on the left
 // and a dropdown-menu part on the right. This enum describes which part the
 // mouse cursor is over currently.
@@ skipping 10 matching lines @@
   int mouseInsideCount_;
   base::scoped_nsobject<NSTrackingArea> trackingAreaButton_;
   base::scoped_nsobject<NSTrackingArea> trackingAreaDropdown_;
 
   base::FilePath downloadPath_;  // stored unelided
   NSString* secondaryTitle_;
   NSFont* secondaryFont_;
   int percentDone_;
   base::scoped_nsobject<NSAnimation> completionAnimation_;
 
-  // In degrees, for downloads with no known total size.
-  int indeterminateProgressAngle_;
+  base::TimeTicks progress_start_time_;
   base::scoped_nsobject<IndeterminateProgressTimer> indeterminateProgressTimer_;
 
   BOOL isStatusTextVisible_;
   CGFloat titleY_;
   CGFloat statusAlpha_;
   base::scoped_nsobject<NSAnimation> toggleStatusVisibilityAnimation_;
 
   scoped_ptr<ui::ThemeProvider> themeProvider_;
 }
 
@@ skipping 11 matching lines @@
 - (BOOL)isStatusTextVisible;
 - (CGFloat)statusTextAlpha;
 - (CGFloat)titleY;
 - (void)skipVisibilityAnimation;
 - (void)showSecondaryTitle;
 - (void)hideSecondaryTitle;
 - (IndeterminateProgressTimer*)indeterminateProgressTimer;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_CELL_H_