Print Preview: Set source modifiable bit for scripted printing.

chrome/browser/printing/print_preview_message_handler.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/printing/print_preview_message_handler.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 82 matching lines @@
   // User might have closed it already.
   if (!print_preview_tab || !print_preview_tab->web_ui())
     return NULL;
 
   return static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
 }
 
 void PrintPreviewMessageHandler::OnRequestPrintPreview(
     bool source_is_modifiable) {
   PrintPreviewTabController::PrintPreview(tab_contents_wrapper());
-
-  TabContentsWrapper* print_preview_tab = GetPrintPreviewTab();
-  if (!print_preview_tab || !print_preview_tab->web_ui())
-    return;
-  PrintPreviewUI* print_preview_ui =
-      static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
-  print_preview_ui->SetSourceIsModifiable(source_is_modifiable);
+  PrintPreviewUI::SetSourceIsModifiable(GetPrintPreviewTab(),
+                                        source_is_modifiable);
 }
 
 void PrintPreviewMessageHandler::OnDidGetPreviewPageCount(
     const PrintHostMsg_DidGetPreviewPageCount_Params& params) {
   if (params.page_count <= 0) {
     NOTREACHED();
     return;
   }
 
   TabContentsWrapper* print_preview_tab = GetPrintPreviewTab();
@@ skipping 140 matching lines @@
     return;
   }
   // If |tab| is navigating and it has a print preview tab, notify |tab| to
   // consider print preview done so it unfreezes the renderer in the case of
   // window.print().
   if (preview_tab)
     tab->print_view_manager()->PrintPreviewDone();
 }
 
 }  // namespace printing