Fix the handling of user gestures for external protocol handler dialogs.

content/public/browser/resource_dispatcher_host_delegate.h

Index: content/public/browser/resource_dispatcher_host_delegate.h
diff --git a/content/public/browser/resource_dispatcher_host_delegate.h b/content/public/browser/resource_dispatcher_host_delegate.h
index 0d0eebc49163eb7edaa05126ba7d8f362a1cbb2a..598cffbe099eac74157bb64c21ddbd23ff5923c8 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_delegate.h
@@ -84,9 +84,12 @@ class CONTENT_EXPORT ResourceDispatcherHostDelegate {
   // Launches the url for the given tab. Returns true if an attempt to handle
   // the url was made, e.g. by launching an app. Note that this does not
   // guarantee that the app successfully handled it.
+  // Some external protocol handlers only run in the context of a user gesture,
+  // so initiated_by_user_gesture should be passed accordingly.
   virtual bool HandleExternalProtocol(const GURL& url,
                                       int child_id,
-                                      int route_id);
+                                      int route_id,
+                                      bool initiated_by_user_gesture);
 
   // Returns true if we should force the given resource to be downloaded.
   // Otherwise, the content layer decides.