Use floating labels for preference forms

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>
 
     <declare-styleable name="HyperlinkPreference">
         <!-- The URL to load when the preference is clicked -->
         <attr name="url" format="string" />
         <!-- True if the hyperlink should look like an <a> element. Default is false. -->
         <attr name="imitateWebLink" format="boolean" />
     </declare-styleable>
 
     <declare-styleable name="ChromeSwitchPreference">
         <!-- Prevents the summary text from being styled like title text in the
              case that the title is empty. -->
         <attr name="dontUseSummaryAsTitle" format="boolean" />
     </declare-styleable>
+
+    <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>
 </resources>