Print Preview: Associating preview requests and responses using an identifier

chrome/renderer/print_web_view_helper_win.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/renderer/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 181 matching lines @@
   // Get the size of the compiled metafile.
   uint32 buf_size = metafile->GetDataSize();
   DCHECK_GT(buf_size, 128u);
 
   PrintHostMsg_DidPreviewDocument_Params preview_params;
   preview_params.reuse_existing_data = false;
   preview_params.data_size = buf_size;
   preview_params.document_cookie = params.params.document_cookie;
   preview_params.expected_pages_count = preview_page_count_;
   preview_params.modifiable = IsModifiable(frame, node);
+  preview_params.preview_request_id = params.params.preview_request_id;
 
   if (!CopyMetafileDataToSharedMem(metafile.get(),
                                    &(preview_params.metafile_data_handle))) {
     return false;
   }
   Send(new PrintHostMsg_DuplicateSection(routing_id(),
                                          preview_params.metafile_data_handle,
                                          &preview_params.metafile_data_handle));
   Send(new PrintHostMsg_PagesReadyForPreview(routing_id(), preview_params));
   return true;
@@ skipping 134 matching lines @@
   // Copy the bits into shared memory.
   if (!metafile->GetData(shared_buf.memory(), buf_size)) {
     NOTREACHED() << "GetData() failed";
     shared_buf.Unmap();
     return false;
   }
   shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), shared_mem_handle);
   shared_buf.Unmap();
   return true;
 }