update elements and fix some bugs

lib/paper_progress.dart

 // DO NOT EDIT: auto-generated with `pub run custom_element_apigen:update`
 
 /// Dart API for the polymer element `paper_progress`.
 @HtmlImport('paper_progress_nodart.html')
 library polymer_elements.lib.src.paper_progress.paper_progress;
 
 import 'dart:html';
 import 'dart:js' show JsArray, JsObject;
 import 'package:web_components/web_components.dart';
 import 'package:polymer_interop/polymer_interop.dart';
 import 'iron_range_behavior.dart';
-import 'paper_styles.dart';
-import 'paper_styles_classes.dart';
+import 'color.dart';
+import 'iron_flex_layout.dart';
 
 /// The progress bars are for situations where the percentage completed can be
 /// determined. They give users a quick sense of how much longer an operation
 /// will take.
 ///
 /// Example:
 ///
 ///     <paper-progress value="10"></paper-progress>
 ///
 /// There is also a secondary progress which is useful for displaying intermediate
@@ skipping 59 matching lines @@
   set indeterminate(bool value) { jsElement[r'indeterminate'] = value; }
 
   /// The number that represents the current secondary progress.
   num get secondaryProgress => jsElement[r'secondaryProgress'];
   set secondaryProgress(num value) { jsElement[r'secondaryProgress'] = value; }
 
   /// The secondary ratio
   num get secondaryRatio => jsElement[r'secondaryRatio'];
   set secondaryRatio(num value) { jsElement[r'secondaryRatio'] = value; }
 }