[Downloads] Add a horizontal material-styled ProgressBar

chrome/android/java/res/values/colors.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2014 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. -->
 
 <resources>
     <!-- Common colors -->
     <color name="default_text_color">#333</color>
     <color name="default_primary_color">#f2f2f2</color>
     <color name="light_normal_color">#5A5A5A</color>
@@ skipping 106 matching lines @@
     <color name="most_visited_offline_badge_tint">#4285f4</color>
 
     <!-- Contextual Search colors -->
     <color name="contextual_search_promo_text_color">#333333</color>
     <color name="contextual_search_promo_background_color">#EEEEEE</color>
     <color name="contextual_search_promo_border_color">#C2C2C2</color>
 
     <!-- Progress Bar colors -->
     <color name="progress_bar_foreground">@color/light_active_color</color>
     <color name="progress_bar_foreground_white">@android:color/white</color>
+    <color name="progress_bar_secondary">@color/google_grey_600</color>
     <color name="progress_bar_background">#3d4386f7</color>
     <color name="progress_bar_background_white">#4d000000</color>
 
     <!-- Theme colors. Also used for toolbar background -->
     <color name="incognito_primary_color">#505050</color>
 
     <!-- LocationBar colors -->
     <color name="locationbar_dark_hint_text">#969696</color>
     <color name="locationbar_light_hint_text">#80ffffff</color>
     <color name="locationbar_light_selection_color">#cc5595fe</color>
@@ skipping 57 matching lines @@
     <color name="payments_section_edit_background">#f5f5f5</color>
     <color name="payments_section_chevron">#b2b2b2</color>
     <color name="payments_section_separator">#e0e0e0</color>
 
     <!-- Other colors -->
     <color name="selectable_list_item_highlight_color">#804281f4</color>
     <color name="media_viewer_bg">#000000</color>
     <color name="image_viewer_bg">#0e0e0e</color>
 
 </resources>