Support fallback key events

 Bug: 6023055

Change-Id: Ifc36425d6b09d0938f7e08176a749159c27fe088
diff --git a/src/com/android/browser/Controller.java b/src/com/android/browser/Controller.java
index fcbe387..3ebaa28 100644
--- a/src/com/android/browser/Controller.java
+++ b/src/com/android/browser/Controller.java
@@ -945,14 +945,15 @@
     }
 
     @Override
-    public void onUnhandledKeyEvent(KeyEvent event) {
+    public boolean onUnhandledKeyEvent(KeyEvent event) {
         if (!isActivityPaused()) {
             if (event.getAction() == KeyEvent.ACTION_DOWN) {
-                mActivity.onKeyDown(event.getKeyCode(), event);
+                return mActivity.onKeyDown(event.getKeyCode(), event);
             } else {
-                mActivity.onKeyUp(event.getKeyCode(), event);
+                return mActivity.onKeyUp(event.getKeyCode(), event);
             }
         }
+        return false;
     }
 
     @Override