[NTP::Downloads] Replace 36dp file type resources with vector drawables.

chrome/android/java/res/values/dimens.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>
     <!-- Connection info popup dimensions -->
     <dimen name="connection_info_padding_wide">24dp</dimen>
     <dimen name="connection_info_padding_thin">16dp</dimen>
 
@@ skipping 276 matching lines @@
     <dimen name="ntp_search_box_height">62dp</dimen>
     <dimen name="ntp_search_box_shadow_width">4dp</dimen>
     <dimen name="ntp_search_box_transition_length">16dp</dimen>
     <dimen name="ntp_wide_card_lateral_margins">48dp</dimen>
     <dimen name="ntp_list_item_min_height">48dp</dimen>
     <dimen name="ntp_list_item_text_size">16sp</dimen>
     <dimen name="ntp_shadow_height">9dp</dimen>
     <dimen name="ntp_sign_in_promo_margin_top">20dp</dimen>
     <dimen name="ntp_progress_indicator_diameter">56dp</dimen>
     <dimen name="snippets_thumbnail_size">72dp</dimen>
+    <!-- file type icon size = snippets_thumbnail_size - 2 * padding -->
+    <dimen name="snippets_thumbnail_file_type_icon_padding">20dp</dimen>
     <dimen name="snippets_thumbnail_margin">16dp</dimen>
     <!-- The default padding for the peeking card and the amount the card peeks by in the current
          peeking card animation (the calculations assume this is the same). -->
     <dimen name="snippets_padding">16dp</dimen>
     <!-- The amount of the peeking card showing above the fold with the increased visibility UI
          (https://crbug.com/660837). -->
     <dimen name="snippets_peeking_card_peek_amount">32dp</dimen>
     <dimen name="snippets_peeking_card_bounce_distance">10dp</dimen>
     <dimen name="snippets_card_gap">0.5dp</dimen>
     <dimen name="snippets_article_header_height">40dp</dimen>
@@ skipping 86 matching lines @@
          is doubled. -->
     <dimen name="pref_autofill_dropdown_bottom_margin">16dp</dimen>
     <dimen name="pref_autofill_touch_target_padding">15dp</dimen>
 
     <!-- Dialog dimensions.
          https://www.google.com/design/spec/components/dialogs.html#dialogs-simple-dialogs -->
     <dimen name="dialog_width_unit">56dp</dimen>  <!-- MD dialog widths are multiples of this. -->
 
     <!-- Downloads dimensions. -->
     <dimen name="downloads_item_icon_size">48dp</dimen>
+    <!-- file type icon size = downloads_item_icon_size - 2 * padding -->
+    <dimen name="downloads_item_file_type_icon_padding">12dp</dimen>
     <dimen name="downloads_item_margin">16dp</dimen>
 
     <!-- SelectableListLayout styles -->
     <dimen name="selectable_list_layout_end_icon">24dp</dimen>
     <dimen name="selectable_list_layout_row_end_padding">16dp</dimen>
     <dimen name="selectable_list_layout_start_icon_width">56dp</dimen>
     <dimen name="toolbar_wide_display_nav_icon_offset">-18dp</dimen>
     <dimen name="toolbar_wide_display_end_offset">-14dp</dimen>
 
     <!--  Miscellaneous dimensions -->
     <dimen name="action_bar_shadow_height">10dp</dimen>
     <dimen name="card_corner_radius">2dp</dimen>
     <dimen name="list_item_corner_radius">3dp</dimen>
     <dimen name="list_item_lateral_padding">1dp</dimen>
     <dimen name="history_default_text_margin">16dp</dimen>
 </resources>