tighten nav bar layout & fix animation bug

  Bug: 6563289

Change-Id: I00fdecf645128bb1fec8e23be94aa2b85fb586f7
diff --git a/src/com/android/browser/UI.java b/src/com/android/browser/UI.java
index aeab746..96f6640 100644
--- a/src/com/android/browser/UI.java
+++ b/src/com/android/browser/UI.java
@@ -146,4 +146,6 @@
 
     public boolean shouldCaptureThumbnails();
 
+    boolean blockFocusAnimations();
+
 }