Use ButtonCompat to get Material-y buttons in more places.

chrome/android/java/res/values-v17/styles.xml

Index: chrome/android/java/res/values-v17/styles.xml
diff --git a/chrome/android/java/res/values-v17/styles.xml b/chrome/android/java/res/values-v17/styles.xml
index 5fe7c958f433dea65f5d30f9b30148ea6ff72b63..5ef65e4eac0e07f786f383789551e3df28604e72 100644
--- a/chrome/android/java/res/values-v17/styles.xml
+++ b/chrome/android/java/res/values-v17/styles.xml
@@ -1,14 +1,12 @@
 <?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.
--->
+     found in the LICENSE file. -->
 
 <resources>
     <!-- Preferences -->
     <style name="PreferencesTheme" parent="ThemeWithActionBar">
         <item name="android:textColorLink">@color/pref_accent_color</item>
-        <item name="android:buttonStyle">@style/PreferenceButtonStyle</item>
         <item name="android:textAppearanceMedium">@style/PreferenceTextAppearanceMedium</item>
         <item name="android:preferenceCategoryStyle">@style/PreferenceCategory</item>
         <item name="android:spinnerItemStyle">@style/PreferenceSpinnerItem</item>
@@ -17,15 +15,6 @@
         <item name="floatLabelPaddingRight">@dimen/pref_autofill_field_horizontal_padding</item>
         <item name="floatLabelPaddingTop">@dimen/pref_autofill_field_top_padding</item>
     </style>
-    <style name="PreferenceButtonStyle" parent="@android:style/Widget.Holo.Light.Button">
-        <!-- TODO(twellington): Delete btn_default_preferences.xml once the AppCompat theme supports
-                                Material-like buttons. -->
-        <item name="android:background">@drawable/btn_default_preferences</item>
-        <item name="android:textAllCaps">true</item>
-        <item name="android:textColor">#fff</item>
-        <item name="android:textSize">14sp</item>
-        <item name="android:textStyle">bold</item>
-    </style>
     <style name="PreferenceTextAppearanceMedium">
         <item name="android:textSize">18sp</item>
         <item name="android:textColor">?android:attr/textColorPrimary</item>