Delegates for the printing component

chrome/renderer/printing/print_web_view_helper.h

Index: chrome/renderer/printing/print_web_view_helper.h
diff --git a/chrome/renderer/printing/print_web_view_helper.h b/chrome/renderer/printing/print_web_view_helper.h
index f144adc45d02b52059541420eb40cbd3c5d76e8d..b7a0bd92e6893e105fe7a3381712451d1bb65d37 100644
--- a/chrome/renderer/printing/print_web_view_helper.h
+++ b/chrome/renderer/printing/print_web_view_helper.h
@@ -39,6 +39,7 @@ namespace printing {
 
 struct PageSizeMargins;
 class PrepareFrameAndViewForPrint;
+class PrintWebViewHelperDelegate;
 
 // Stores reference to frame using WebVew and unique name.
 // Workaround to modal dialog issue on Linux. crbug.com/236147.
@@ -66,7 +67,8 @@ class PrintWebViewHelper
     : public content::RenderViewObserver,
       public content::RenderViewObserverTracker<PrintWebViewHelper> {
  public:
-  explicit PrintWebViewHelper(content::RenderView* render_view);
+  explicit PrintWebViewHelper(content::RenderView* render_view,
+                              scoped_ptr<PrintWebViewHelperDelegate> delegate);
   ~PrintWebViewHelper() override;
 
   // Disable print preview and switch to system dialog printing even if full
@@ -327,6 +329,8 @@ class PrintWebViewHelper
   // True, when printing from print preview.
   bool print_for_preview_;
 
+  scoped_ptr<PrintWebViewHelperDelegate> delegate_;
+
   // Keeps track of the state of print preview between messages.
   // TODO(vitalybuka): Create PrintPreviewContext when needed and delete after
   // use. Now it's interaction with various messages is confusing.