Bug 857120: Revert awesomebar overdraw to save action-bar. [r=mfinkle]

mobile/android/base/resources/values-v11/themes.xml

@@ -54,7 +54,6 @@
 
     <style name="Gecko.Light.AwesomeBar">
         <item name="android:actionBarStyle">@style/ActionBar.AwesomeBar</item>
-        <item name="android:windowBackground">@null</item>
     </style>
 
     <style name="Gecko.TitleBar.Preferences">

mobile/android/base/resources/values/themes.xml

@@ -40,9 +40,7 @@
         <item name="android:windowBackground">@color/background_normal</item>
     </style>
 
-    <style name="Gecko.Light.AwesomeBar">
-        <item name="android:windowBackground">@null</item>
-    </style>
+    <style name="Gecko.Light.AwesomeBar"/>
     
     <style name="Gecko.TitleBar.Preferences">
         <item name="android:windowBackground">@color/background_normal</item>