Instant App Banner logic.

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java
index 9eb1f7571ede969b1ad1ba6a0ce6b744f9b8b768..156cc6f0bf837fe3a190f5e0a546b8a1b0ceadf1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegate.java
@@ -133,9 +133,10 @@ interface ExternalNavigationDelegate {
     /**
      * Check if the URL should be handled by an instant app, or kick off an async request for an
      * instant app banner.
+     * @param tab The current tab.
      * @param url The current URL.
      * @param referrerUrl The referrer URL.
      * @return Whether we launched an instant app.
      */
-    boolean maybeLaunchInstantApp(String url, String referrerUrl);
+    boolean maybeLaunchInstantApp(Tab tab, String url, String referrerUrl);
 }