Support fallback key events

 Bug: 6023055

Change-Id: Ifc36425d6b09d0938f7e08176a749159c27fe088
diff --git a/src/com/android/browser/WebViewController.java b/src/com/android/browser/WebViewController.java
index 30eec4f..235fe97 100644
--- a/src/com/android/browser/WebViewController.java
+++ b/src/com/android/browser/WebViewController.java
@@ -63,7 +63,7 @@
 
     boolean shouldOverrideKeyEvent(KeyEvent event);
 
-    void onUnhandledKeyEvent(KeyEvent event);
+    boolean onUnhandledKeyEvent(KeyEvent event);
 
     void doUpdateVisitedHistory(Tab tab, boolean isReload);