Async frame preparation for Preview with support if selection.

chrome/renderer/printing/print_web_view_helper_win.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 "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/process_util.h"
@@ skipping 85 matching lines @@
                                             print_params.dpi);
   scoped_ptr<Metafile> draft_metafile;
   Metafile* initial_render_metafile = print_preview_context_.metafile();
 
   if (print_preview_context_.IsModifiable() && is_print_ready_metafile_sent_) {
     draft_metafile.reset(new PreviewMetafile);
     initial_render_metafile = draft_metafile.get();
   }
 
   base::TimeTicks begin_time = base::TimeTicks::Now();
-  RenderPage(print_params, page_number, print_preview_context_.frame(), true,
-             initial_render_metafile, &actual_shrink, NULL, NULL);
+  RenderPage(print_params, page_number, print_preview_context_.prepared_frame(),
+             true, initial_render_metafile, &actual_shrink, NULL, NULL);
   print_preview_context_.RenderedPreviewPage(
       base::TimeTicks::Now() - begin_time);
 
   if (draft_metafile.get()) {
     draft_metafile->FinishDocument();
   } else if (print_preview_context_.IsModifiable() &&
              print_preview_context_.generate_draft_pages()) {
     DCHECK(!draft_metafile.get());
     draft_metafile.reset(
         print_preview_context_.metafile()->GetMetafileForCurrentPage());
@@ skipping 122 matching lines @@
   }
   shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), shared_mem_handle);
   shared_buf.Unmap();
 
   Send(new PrintHostMsg_DuplicateSection(routing_id(), *shared_mem_handle,
                                          shared_mem_handle));
   return true;
 }
 
 }  // namespace printing