Use floating labels for preference forms

chrome/android/java/res/values-v17/styles.xml

Index: chrome/android/java/res/values-v17/styles.xml
diff --git a/chrome/android/java/res/values-v17/styles.xml b/chrome/android/java/res/values-v17/styles.xml
index ce635c6af9e7b72b0249c1c2dcf7be0d7eac59f3..ebfb51192833a0ac4ab2576884505d0fe431de9a 100644
--- a/chrome/android/java/res/values-v17/styles.xml
+++ b/chrome/android/java/res/values-v17/styles.xml
@@ -51,6 +51,7 @@
         <item name="android:textColor">?android:attr/textColorSecondary</item>
     </style>
     <style name="PreferenceScreenLayout">
+        <item name="android:paddingTop">16dp</item>
         <item name="android:paddingStart">16dp</item>
         <item name="android:paddingEnd">16dp</item>
     </style>
@@ -66,6 +67,14 @@
     <style name="DeprecationWarningPreferenceTheme" parent="PreferencesTheme">
         <item name="android:textSize">14sp</item>
     </style>
+    <style name="PreferenceFloatLabelTextAppearance">

[newt (away), 2015/01/27 01:45:05]

In PreferencesTheme, you can set PreferenceFloatLabelTextAppearance as the
default value for floatLabelTextAppearance, and it'll automatically be applied
to all FloatLabelLayouts:

  <item
name="floatLabelTextAppearance">@style/PreferenceFloatLabelTextAppearance</item>

[Theresa, 2015/01/28 02:05:40]

Done.

+        <item name="android:textColor">@color/float_label</item>
+        <item name="android:textSize">14sp</item>
+    </style>
+    <style name="PreferenceTextFieldLabel" parent="@style/BoldTextFieldLabel">

[newt (away), 2015/01/27 01:45:05]

When is this style used vs the other? Could you post screenshots on the bug?

[Theresa, 2015/01/28 02:05:40]

It was being used for the labels above the spinners, but there isn't really a
difference. I'll drop this style and just use PreferenceFloatLabelTextAppearance
for those as well.

+        <item name="android:textStyle">normal</item>
+        <item name="android:textColor">@color/secondary_text_default_material_light</item>
+    </style>
 
     <style name="ThemeWithActionBar" parent="Theme.AppCompat.Light.DarkActionBar">
         <item name="android:windowBackground">@android:color/white</item>