Fix print media page size by using the value we compute.

chrome/renderer/print_web_view_helper.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 <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 1363 matching lines @@
   DCHECK_EQ(INITIALIZED, state_);
   ClearContext();
 }
 
 bool PrintWebViewHelper::PrintPreviewContext::CreatePreviewDocument(
     PrintMsg_Print_Params* print_params,
     const std::vector<int>& pages) {
   DCHECK_EQ(INITIALIZED, state_);
   state_ = RENDERING;
 
-  print_params_.reset(new PrintMsg_Print_Params(*print_params));
-
   metafile_.reset(new printing::PreviewMetafile);
   if (!metafile_->Init()) {
     set_error(PREVIEW_ERROR_METAFILE_INIT_FAILED);
     LOG(ERROR) << "PreviewMetafile Init failed";
     return false;
   }
 
   // Need to make sure old object gets destroyed first.
   prep_frame_view_.reset(new PrepareFrameAndViewForPrint(*print_params, frame(),
                                                          node()));
   UpdatePrintableSizeInPrintParameters(frame_, node_,
                                        prep_frame_view_.get(), print_params);
 
+  print_params_.reset(new PrintMsg_Print_Params(*print_params));
+
   total_page_count_ = prep_frame_view_->GetExpectedPageCount();
   if (total_page_count_ == 0) {
     LOG(ERROR) << "CreatePreviewDocument got 0 page count";
     set_error(PREVIEW_ERROR_ZERO_PAGES);
     return false;
   }
 
   int selected_page_count = pages.size();
   current_page_index_ = 0;
   print_ready_metafile_page_count_ = selected_page_count;
@@ skipping 149 matching lines @@
   DCHECK(IsRendering());
   return prep_frame_view_->GetPrintCanvasSize();
 }
 
 void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
   prep_frame_view_.reset();
   metafile_.reset();
   pages_to_render_.clear();
   error_ = PREVIEW_ERROR_NONE;
 }