Use larger vector graphics for special tiles and fix selection ring.

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 11 matching lines @@
     <color name="google_blue_grey_500">#607D8B</color>
     <color name="google_red_700">#c53929</color>
     <color name="google_green_700">#0b8043</color>
     <color name="google_grey_100">#f5f5f5</color>
     <color name="google_grey_200">#eeeeee</color>
     <color name="google_grey_300">#e0e0e0</color>
     <color name="google_grey_400">#bdbdbd</color>
     <color name="google_grey_500">#9E9E9E</color>
     <color name="google_grey_600">#757575</color>
     <color name="toolbar_shadow_color">#1d000000</color>
+    <color name="white_alpha_40">#64FFFFFF</color>

[Theresa, 2017/05/04 15:27:13]

Is white_alpha_50 close enough (can we avoid adding another shade of white)?

     <color name="white_alpha_50">#80ffffff</color>
     <color name="white_alpha_70">#B3FFFFFF</color>
     <color name="toolbar_light_tint">#A3000000</color>
     <color name="light_grey">#ccc</color>
     <color name="modal_dialog_scrim_color">#7f000000</color>
 
     <!-- New list of common text colors -->
+    <color name="black_alpha_20">#33000000</color>
     <color name="black_alpha_30">#4d000000</color>
     <color name="black_alpha_38">#61000000</color>
     <color name="black_alpha_40">#66000000</color>
     <color name="black_alpha_54">#8a000000</color>
     <color name="black_alpha_87">#de000000</color>
 
     <!-- Infobar colors -->
     <color name="infobar_accent_blue">#4285f4</color>
     <color name="infobar_descriptive_text_color">#646464</color>
 
@@ skipping 162 matching lines @@
 
     <!-- Translate Infobar colors -->
     <color name="translate_overflow_menu_divider_color">#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>