Add a custome edittext that encapsulates the error message logic

chrome/android/java/res/values/attrs.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>
     <declare-styleable name="TintedImage">
         <attr name="tint" format="reference|color" />
     </declare-styleable>
 
@@ skipping 20 matching lines @@
     <declare-styleable name="FloatLabelLayout">
         <attr name="floatLabelTextAppearance" format="reference" />
         <attr name="floatLabelPaddingLeft" format="reference|dimension" />
         <attr name="floatLabelPaddingRight" format="reference|dimension" />
         <attr name="floatLabelPaddingTop" format="reference|dimension" />
         <attr name="floatLabelPaddingBottom" format="reference|dimension" />
         <!-- The hint to display in the floating label -->
         <attr name="floatLabelHint" format="reference|string" />
     </declare-styleable>
 
+    <declare-styleable name="EmptyAlertEditText">
+        <attr name="alertMessage" format="string" />
+    </declare-styleable>
+
     <declare-styleable name="ButtonCompat">
         <attr name="buttonColor" format="reference|color"/>
     </declare-styleable>
 
     <declare-styleable name="PaddedFrameLayout">
         <attr name="maxChildWidth" format="dimension" />
         <attr name="maxChildHeight" format="dimension" />
     </declare-styleable>
 
     <declare-styleable name="BoundedView">
         <attr name="maxWidth" format="dimension" />
     </declare-styleable>
 
 </resources>