Add callout for the tab switcher button

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 201 matching lines @@
         <item name="android:showDividers">middle</item>
     </style>
     <style name="ButtonBarButton" parent="@android:style/Widget.Holo.Light.Button">
         <item name="android:layout_width">0dp</item>
         <item name="android:layout_height">match_parent</item>
         <item name="android:layout_weight">1</item>
         <item name="android:background">?attr/selectableItemBackground</item>
         <item name="android:paddingStart">4dp</item>
         <item name="android:paddingEnd">4dp</item>
     </style>
-    <style name="info_bubble">
-        <item name="android:textColor">@android:color/white</item>
-        <item name="android:textStyle">bold</item>
-        <item name="android:textSize">18sp</item>
+
+    <!-- Bubble styles -->
+    <style name="TextBubbleAnimation">
+        <item name="android:windowEnterAnimation">@anim/text_bubble_in</item>
+        <item name="android:windowExitAnimation">@anim/text_bubble_out</item>
     </style>
     <style name="FullscreenNotificationBubble" parent="@android:style/Animation.Toast">
         <item name="android:windowEnterAnimation">@anim/fullscreen_notification_in</item>
     </style>
 
     <!-- Data Saver -->
     <style name="DataReductionPromoScreenDialog" >
         <item name="android:background">@android:color/transparent</item>
         <item name="android:backgroundDimEnabled">false</item>
         <item name="android:clipChildren">false</item>
@@ skipping 232 matching lines @@
     <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>
 </resources>