Revert "Set background for expanded search bar to white."

This reverts commit 97d8308894803843bb49e273752950853529e8a7.

Change-Id: I1468e65b7db9ecac08105e524e0d3c753f6c139d
diff --git a/res-common/layout/search_bar_expanded.xml b/res-common/layout/search_bar_expanded.xml
index 241eb8e..c530299 100644
--- a/res-common/layout/search_bar_expanded.xml
+++ b/res-common/layout/search_bar_expanded.xml
@@ -20,8 +20,7 @@
     android:layout_height="match_parent"
     android:orientation="horizontal"
     android:gravity="center_vertical"
-    android:visibility="gone"
-    android:background="@android:color/white">
+    android:visibility="gone" >
 
     <ImageButton
         android:id="@+id/search_back_button"