Set home button enabled

 Bug: 5553034

Change-Id: Ifc47c233af3ac3010045498739ee5e1602656ce2
diff --git a/src/com/android/browser/ComboViewActivity.java b/src/com/android/browser/ComboViewActivity.java
index ae49898..2d382cb 100644
--- a/src/com/android/browser/ComboViewActivity.java
+++ b/src/com/android/browser/ComboViewActivity.java
@@ -63,6 +63,7 @@
         if (BrowserActivity.isTablet(this)) {
             bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME
                     | ActionBar.DISPLAY_USE_LOGO);
+            bar.setHomeButtonEnabled(true);
         } else {
             bar.setDisplayOptions(0);
         }