Initial skeleton of custom layouts for Web Notifications.

chrome/android/java/res/values-v17/styles.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 xmlns:tools="http://schemas.android.com/tools">
     <!-- Q: Why put style resources under values-v17/ ?
          A: Problem:
             1. paddingStart causes a crash on Galaxy Tab&Note b/8351339.
             2. So we wrote a build script(generate_v14_compatible_resources.py) to convert
@@ skipping 260 matching lines @@
         parent="@android:style/Widget.Holo.ProgressBar.Horizontal"/>
     <style name="CastMediaRouteButton" parent="@style/Widget.MediaRouter.MediaRouteButton">
         <item name="android:background">@null</item>
         <item name="android:paddingTop">0dp</item>
         <item name="android:paddingBottom">0dp</item>
         <item name="android:paddingStart">0dp</item>
         <item name="android:paddingEnd">0dp</item>
         <item name="externalRouteEnabledDrawable">@drawable/ic_cast_dark_chrome</item>
     </style>
 
+    <!-- Web Notifications -->
+    <style name="WebNotificationTitle"
+        parent="@style/TextAppearance.StatusBar.EventContent.Title"/>
+    <style name="WebNotificationBody"
+        parent="@style/TextAppearance.StatusBar.EventContent.Line2"/>
+    <style name="WebNotificationOrigin"
+        parent="@style/TextAppearance.StatusBar.EventContent.Info"/>
+    <style name="WebNotificationTime"
+        parent="@style/TextAppearance.StatusBar.EventContent.Time"/>
+
     <!-- First Run and Bookmark/recent-tabs dialogs -->
     <style name="DialogWhenLarge" parent="Theme.AppCompat.Light.DialogWhenLarge" >
         <item name="android:windowBackground">@drawable/bg_white_dialog</item>
         <item name="android:statusBarColor" tools:targetApi="21">@android:color/black</item>
         <item name="android:textColorLink">@color/light_active_color</item>
         <item name="colorPrimary">@color/light_active_color</item>
         <item name="colorAccent">@color/light_active_color</item>
 
         <!-- Remove ActionBar -->
         <item name="windowNoTitle">true</item>
@@ skipping 112 matching lines @@
     <style name="LocationBarButton">
         <item name="android:background">@null</item>
     </style>
     <style name="ToolbarButton">
         <item name="android:background">?attr/selectableItemBackground</item>
         <item name="android:layout_width">48dp</item>
         <item name="android:layout_height">56dp</item>
         <item name="android:scaleType">center</item>
     </style>
 </resources>