Add update menu item and app menu icon badge

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 447 matching lines @@
     </style>
     <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>
+    <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="UpdateMenuBadge">
+        <item name="android:layout_height">@dimen/menu_badge_size</item>
+        <item name="android:layout_width">@dimen/menu_badge_size</item>
+        <item name="android:layout_gravity">end|bottom</item>
+        <item name="android:layout_marginBottom">14dp</item>
+        <item name="android:focusable">false</item>
+        <item name="android:importantForAccessibility">no</item>
+        <item name="android:visibility">invisible</item>

[Theresa, 2015/12/10 21:22:53]

I changed this from gone to invisible so that the view gets measured and the tab
switcher animation looks correct the first time it runs. I added another method
to Toolbar to set the visibility to gone that can get called once we know the
badge won't show so that it doesn't take up cycles during layout.

I'm not particularly happy with this solution, so I'll try to think of a better
way of getting the view to measure itself when it needs to.

[gone, 2015/12/10 21:45:09]

Acknowledged.

[Theresa, 2015/12/11 19:44:46]

I discussed this w/ newt@ offline and I think making this invisible is the best
approach. The alternative is manually calling mMenuBadge.onMeasure() or
mMenuBadge.onLayout().

+    </style>
 </resources>