From b6ec9468136c266c93dd542ddc78dd88f406618f Mon Sep 17 00:00:00 2001
From: Tim Perry <pimterry@gmail.com>
Date: Thu, 30 Jul 2015 17:16:20 +0100
Subject: [PATCH] Mark hasListener as returning a boolean

---
 chrome/chrome.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chrome/chrome.d.ts b/chrome/chrome.d.ts
index 1df792b42..660ea64bd 100755
--- a/chrome/chrome.d.ts
+++ b/chrome/chrome.d.ts
@@ -869,7 +869,7 @@ declare module chrome.events {
         addListener(callback: Function): void;
         getRules(callback: (rules: Rule[]) => void): void;
         getRules(ruleIdentifiers: string[], callback: (rules: Rule[]) => void): void;
-        hasListener(callback: Function): void;
+        hasListener(callback: Function): boolean;
         removeRules(ruleIdentifiers?: string[], callback?: Function): void;
         addRules(rules: Rule[], callback?: (rules: Rule[]) => void): void;
         removeListener(callback: Function): void;