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

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 923431582ceb0ce4d5575d7bae386ac35d74e166..574122e2b2723875f2671bc7f5579196c5506b66 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -679,8 +679,15 @@ bool ResourceDispatcherHostImpl::HandleExternalProtocol(ResourceLoader* loader,
   if (job_factory->IsHandledURL(url))
     return false;
 
-  return delegate_->HandleExternalProtocol(url, info->GetChildID(),
-                                           info->GetRouteID());
+  bool initiated_by_user_gesture =
+      (loader->request()->load_flags() & net::LOAD_MAYBE_USER_GESTURE) != 0;
+  bool handled = delegate_->HandleExternalProtocol(url, info->GetChildID(),
+                                                   info->GetRouteID(),
+                                                   initiated_by_user_gesture);
+  // Consume the user gesture if the external protocol dialog is shown.
+  if (handled)
+    last_user_gesture_time_ = base::TimeTicks();
+  return handled;
 }
 
 void ResourceDispatcherHostImpl::DidStartRequest(ResourceLoader* loader) {