Move ButtonCompat to ui/android/

chrome/android/java/res/layout/recent_tabs_sync_promo.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2015 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. -->
 
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical"
     android:paddingTop="10dp"
     android:paddingBottom="28dp" >
 
     <TextView
         android:id="@+id/text_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:textSize="14sp" />
 
-    <org.chromium.chrome.browser.widget.ButtonCompat
+    <org.chromium.ui.widget.ButtonCompat
         android:id="@+id/enable_sync_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginTop="24dp"
         android:text="@string/ntp_recent_tabs_sync_enable_sync_button"
         android:textColor="#fff"
         chrome:buttonColor="@color/light_active_color" />
 
 </LinearLayout>