[Downloads] Add a horizontal material-styled ProgressBar

chrome/android/java/res/values/attrs.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>
     <declare-styleable name="TintedImage">
         <attr name="tint" format="reference|color" />
     </declare-styleable>
 
@@ skipping 39 matching lines @@
     <declare-styleable name="BoundedView">
         <attr name="maxWidth" format="dimension" />
         <attr name="maxHeight" format="dimension" />
     </declare-styleable>
 
     <declare-styleable name="ClipDrawableProgressBar">
         <attr name="progressBarColor" format="reference|color" />
         <attr name="backgroundColor" format="reference|color" />
     </declare-styleable>
 
+    <declare-styleable name="MaterialProgressBar">
+        <attr name="colorBackground" format="reference|color" />
+        <attr name="colorProgress" format="reference|color" />
+        <attr name="colorSecondaryProgress" format="reference|color" />
+    </declare-styleable>
+
     <declare-styleable name="RadioButtonWithDescription">
         <attr name="titleText" format="string" />
     </declare-styleable>
 
     <declare-styleable name="TextMessageWithLinkAndIconPreference">
         <!-- Used on a TextMessageWithLinkAndIconPreference that is followed
              by another TextMessageWithLinkAndIconPreference to remove the
              bottom spacing, so that related paragraphs of text are closer
              to each other. -->
         <attr name="noBottomSpacing" format="boolean" />
     </declare-styleable>
 </resources>