Improve syncing between dom distiller and the print preview request

components/dom_distiller/core/dom_distiller_service.cc

Index: components/dom_distiller/core/dom_distiller_service.cc
diff --git a/components/dom_distiller/core/dom_distiller_service.cc b/components/dom_distiller/core/dom_distiller_service.cc
index 47d4f06d62986afcde2b3d376989f3a1380f3fc8..bf0a680a0b0e9343b93c1b05af3b3fcc3eb3c181 100644
--- a/components/dom_distiller/core/dom_distiller_service.cc
+++ b/components/dom_distiller/core/dom_distiller_service.cc
@@ -189,6 +189,15 @@ scoped_ptr<ViewerHandle> DomDistillerService::ViewUrl(
   return viewer_handle;
 }
 
+scoped_ptr<ViewerHandle> DomDistillerService::AddViewRequestDelegate(
+    ViewRequestDelegate* delegate,
+    const GURL& url) {
+  TaskTracker* task_tracker = nullptr;
+  GetOrCreateTaskTrackerForUrl(url, &task_tracker);
+  scoped_ptr<ViewerHandle> viewer_handle = task_tracker->AddViewer(delegate);

[Bernhard Bauer, 2016/01/19 17:21:02]

You can just directly return this.

[mvendramini_hp, 2016/01/20 11:56:57]

Done.

+  return viewer_handle;
+}
+
 bool DomDistillerService::GetOrCreateTaskTrackerForUrl(
     const GURL& url,
     TaskTracker** task_tracker) {