use thumbnails in tab switcher

Change-Id: I0c7bda38c4c12448822f575f6fe0670f87b3eb7b
diff --git a/res/values/dimensions.xml b/res/values/dimensions.xml
index b695120..f1e7fb3 100644
--- a/res/values/dimensions.xml
+++ b/res/values/dimensions.xml
@@ -57,4 +57,5 @@
     <dimen name="combo_paddingTop">10dip</dimen>
     <dimen name="combo_paddingLeftRight">8dip</dimen>
     <dimen name="combo_horizontalSpacing">6dip</dimen>
+    <dimen name="tab_view_thumbnail_height">76dip</dimen>
 </resources>