Add support for Android spellcheck menu in Chrome/WebViews

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 555 matching lines @@
     </style>
     <style name="ToolbarMenuButtonTablet" parent="ToolbarButton">
         <item name="android:layout_width">43dp</item>
         <item name="android:paddingEnd">3.5dp</item>
     </style>
     <style name="AppMenuItem">
         <item name="android:paddingStart">16dp</item>
         <item name="android:paddingEnd">16dp</item>
         <item name="android:background">?attr/listChoiceBackgroundIndicator</item>
     </style>
-    <style name="RobotoMediumStyle">
-        <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textStyle">bold</item>
-    </style>
     <style name="NumberRollTextViewStyle">
         <item name="android:layout_width">wrap_content</item>
         <item name="android:layout_height">wrap_content</item>
         <item name="android:layout_gravity">center_vertical</item>
         <item name="android:singleLine">true</item>
         <item name="android:textColor">@android:color/white</item>
         <item name="android:textSize">20sp</item>
     </style>
     <style name="BottomSheetContentTitle" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
         <item name="android:textSize">20sp</item>
@@ skipping 158 matching lines @@
         <item name="android:windowEnterAnimation">@anim/design_bottom_sheet_slide_in</item>
         <item name="android:windowExitAnimation">@null</item>
     </style>
 
     <!-- VR animations -->
     <style name="VrEntryAnimation">
         <item name="android:windowEnterAnimation">@anim/stay_hidden</item>
         <item name="android:windowExitAnimation">@null</item>
     </style>
 </resources>