Improve syncing between dom distiller and the print preview request

chrome/browser/ui/webui/print_preview/print_preview_distiller.h

Index: chrome/browser/ui/webui/print_preview/print_preview_distiller.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_distiller.h b/chrome/browser/ui/webui/print_preview/print_preview_distiller.h
index aef2cea6cb6f8b5dc857f5a5769b1004abc190a7..fe0989c9ec290d20cacad05f18dae34b27eda1bc 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_distiller.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_distiller.h
@@ -11,8 +11,11 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
+#include "components/dom_distiller/core/task_tracker.h"
 #include "content/public/browser/web_contents_observer.h"
 
+using dom_distiller::ViewerHandle;

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

Don't use `using` in headers – it imports this into the global namespace for
everyone who includes this header!

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

Done - you are right, this was an overlook, good catch.

+
 namespace net {
 class URLRequestContextGetter;
 }
@@ -51,6 +54,8 @@ class PrintPreviewDistiller {
 
   scoped_ptr<WebContentsDelegateImpl> web_contents_delegate_;
 
+  scoped_ptr<ViewerHandle> viewer_handle_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewDistiller);
 };