Fix for Issue 50340: @page rules inside @media print rules are not properly...

chrome/renderer/print_web_view_helper.cc

 // Copyright (c) 2009 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 "app/l10n_util.h"
 #include "base/logging.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/render_view.h"
@@ skipping 421 matching lines @@
         ConvertPixelsToPointDouble(margin_bottom_in_pixels);
   if (margin_left_in_points)
     *margin_left_in_points =
         ConvertPixelsToPointDouble(margin_left_in_pixels);
 }
 
 void PrintWebViewHelper::UpdatePrintableSizeInPrintParameters(
     WebFrame* frame, ViewMsg_Print_Params* params) {
   double content_width_in_points;
   double content_height_in_points;
+  PrepareFrameAndViewForPrint prepare(*params, frame, frame->view());
   PrintWebViewHelper::GetPageSizeAndMarginsInPoints(frame, 0, *params,
                                                     &content_width_in_points,
                                                     &content_height_in_points,
                                                     NULL, NULL, NULL, NULL);
 #if defined(OS_MACOSX)
   params->printable_size = gfx::Size(
       static_cast<int>(content_width_in_points),
       static_cast<int>(content_height_in_points));
 #else
   params->printable_size = gfx::Size(
       static_cast<int>(ConvertUnitDouble(
           content_width_in_points, printing::kPointsPerInch, params->dpi)),
       static_cast<int>(ConvertUnitDouble(
           content_height_in_points, printing::kPointsPerInch, params->dpi)));
 #endif
 }