Unifying NativeMetafile class interface (as much as possible) for Linux, Mac, Win

chrome/renderer/print_web_view_helper_linux.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/file_descriptor_posix.h"
 #include "base/logging.h"
 #include "base/scoped_ptr.h"
 #include "chrome/common/render_messages.h"
@@ skipping 194 matching lines @@
   GetPageSizeAndMarginsInPoints(frame,
                                 params.page_number,
                                 params.params,
                                 &content_width_in_points,
                                 &content_height_in_points,
                                 &margin_top_in_points,
                                 &margin_right_in_points,
                                 &margin_bottom_in_points,
                                 &margin_left_in_points);
 
+  gfx::Size page_size(static_cast<int>(content_width_in_points),
+                      static_cast<int>(content_height_in_points));
+
   cairo_t* cairo_context =
-      metafile->StartPage(content_width_in_points,
-                          content_height_in_points,
+      metafile->StartPage(page_size,
                           margin_top_in_points,
                           margin_right_in_points,
                           margin_bottom_in_points,
                           margin_left_in_points);
   if (!cairo_context)
     return;
 
   canvas->reset(new skia::VectorCanvas(cairo_context,
                                        canvas_size.width(),
                                        canvas_size.height()));
   frame->printPage(params.page_number, canvas->get());
 
   // TODO(myhuang): We should handle transformation for paper margins.
   // TODO(myhuang): We should render the header and the footer.
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   if (!metafile->FinishPage())
     NOTREACHED() << "metafile failed";
 }