Fix empty url check

 Bug: 3213668

Change-Id: I83a8bb68d44a0eb88b077d3892875f4ca11f08d7
diff --git a/src/com/android/browser/IntentHandler.java b/src/com/android/browser/IntentHandler.java
index 0b47668..6e0236f 100644
--- a/src/com/android/browser/IntentHandler.java
+++ b/src/com/android/browser/IntentHandler.java
@@ -276,7 +276,7 @@
     private static boolean handleWebSearchRequest(Activity activity,
             Controller controller, String inUrl, Bundle appData,
             String extraData) {
-        if (inUrl == null) return false;
+        if (TextUtils.isEmpty(inUrl)) return false;
 
         // In general, we shouldn't modify URL from Intent.
         // But currently, we get the user-typed URL from search box as well.