Use floating labels for preference forms

chrome/android/java/res/values/attrs.xml

Index: chrome/android/java/res/values/attrs.xml
diff --git a/chrome/android/java/res/values/attrs.xml b/chrome/android/java/res/values/attrs.xml
index ed2f134d92fa6943375923b78c53274783f24b36..4a25bfd60a2512a363c37f5a7829d12c3c4a766b 100644
--- a/chrome/android/java/res/values/attrs.xml
+++ b/chrome/android/java/res/values/attrs.xml
@@ -20,4 +20,14 @@
              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>