[Experimental] Supporting OOPIF printing

components/printing/renderer/print_web_view_helper_mac.mm

 // 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 "components/printing/renderer/print_web_view_helper.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
@@ skipping 35 matching lines @@
   CHECK(metafile.Init());
 
   int page_number = params.page_number;
   gfx::Size page_size_in_dpi;
   gfx::Rect content_area_in_dpi;
   RenderPage(print_pages_params_->params, page_number, frame, false, &metafile,
              &page_size_in_dpi, &content_area_in_dpi);
   metafile.FinishDocument();
 
   PrintHostMsg_DidPrintPage_Params page_params;
-  page_params.data_size = metafile.GetDataSize();
   page_params.page_number = page_number;
   page_params.document_cookie = params.params.document_cookie;
   page_params.page_size = page_size_in_dpi;
   page_params.content_area = content_area_in_dpi;
 
   // Ask the browser to create the shared memory for us.
-  if (!CopyMetafileDataToSharedMem(metafile,
-                                   &(page_params.metafile_data_handle))) {
+  if (!CopyMetafileDataToSharedMem(metafile, &page_params)) {
     // TODO(thestig): Fail and return false instead.
     page_params.data_size = 0;
   }
 
   Send(new PrintHostMsg_DidPrintPage(routing_id(), page_params));
 }
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 bool PrintWebViewHelper::RenderPreviewPage(
     int page_number,
@@ skipping 77 matching lines @@
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
     RenderPageContent(frame, page_number, canvas_area, content_area,
                       scale_factor, static_cast<blink::WebCanvas*>(canvas));
   }
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   metafile->FinishPage();
 }
 
 }  // namespace printing