Added timer to unblock UI for tab switching

- A timer that unblocks UI if capture does not return
  when user presses tab switcher

Change-Id: Ibabaf4af804a1f2de236e4617fba6d66c8a8a4ca
diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index bb1ec9d..e18cb2a 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -1202,7 +1202,7 @@
         mTabHistoryUpdateObservable = new Observable();
     }
 
-    private void initCaptureBitmap() {
+    public void initCaptureBitmap() {
         mCapture = Bitmap.createBitmap(mCaptureWidth, mCaptureHeight, Bitmap.Config.RGB_565);
         mCapture.eraseColor(Color.WHITE);
     }