Use floating labels for preference forms

chrome/android/java/res/color/float_label.xml

Index: chrome/android/java/res/color/float_label.xml
diff --git a/chrome/android/java/res/drawable/app_banner_button_close.xml b/chrome/android/java/res/color/float_label.xml
similarity index 62%
copy from chrome/android/java/res/drawable/app_banner_button_close.xml
copy to chrome/android/java/res/color/float_label.xml
index 8111617d121ca87d953473831451d03b64c9a556..40e6a8e75144ca371dfa5d274aa8c8d1a088f09e 100644
--- a/chrome/android/java/res/drawable/app_banner_button_close.xml
+++ b/chrome/android/java/res/color/float_label.xml
@@ -1,12 +1,9 @@
 <?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.
 -->
-
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:state_pressed="true" android:drawable="@color/app_banner_card_highlight" />
-    <item android:drawable="@android:color/transparent" />
-</selector>
+    <item android:color="@color/pref_accent_color" android:state_activated="true" />
+    <item android:color="@color/secondary_text_default_material_light" />
+</selector>