[Chrome] Support NumCopies print preset

chrome/renderer/printing/print_web_view_helper.cc

 // Copyright (c) 2012 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/renderer/printing/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 1015 matching lines @@
 
   // If we are previewing a pdf and the print scaling is disabled, send a
   // message to browser.
   if (print_pages_params_->params.is_first_request &&
       !print_preview_context_.IsModifiable() &&
       print_preview_context_.source_frame()->isPrintScalingDisabledForPlugin(
           print_preview_context_.source_node())) {
     Send(new PrintHostMsg_PrintPreviewScalingDisabled(routing_id()));
   }
 
+  // FIXME: Is this right approach?
+  // Send a message to browser if number of copies to be printed information is

[Vitaly Buka (NO REVIEWS), 2014/07/10 01:13:05]

Should be inside of:
if (print_pages_params_->params.is_first_request &&
    !print_preview_context_.IsModifiable() &&

+  // available.
+  int num_copies = print_preview_context_.source_frame()->getNumCopiesForPlugin(
+      print_preview_context_.source_node());
+  if (print_pages_params_->params.is_first_request && num_copies)
+    Send(new PrintHostMsg_PrintPreviewNumCopies(routing_id(), num_copies));

[Nikhil, 2014/07/09 09:36:47]

Is this right approach?

[Vitaly Buka (NO REVIEWS), 2014/07/10 01:13:05]

yes

+
   is_print_ready_metafile_sent_ = false;
 
   // PDF printer device supports alpha blending.
   print_pages_params_->params.supports_alpha_blend = true;
 
   bool generate_draft_pages = false;
   if (!settings.GetBoolean(kSettingGenerateDraftData,
                            &generate_draft_pages)) {
     NOTREACHED();
   }
@@ skipping 976 matching lines @@
 }
 
 void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
   prep_frame_view_.reset();
   metafile_.reset();
   pages_to_render_.clear();
   error_ = PREVIEW_ERROR_NONE;
 }
 
 }  // namespace printing