Plumbs through screen size and scale factor to html_viewer

components/html_viewer/ui_setup.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_HTML_VIEWER_UI_SETUP_H_
 #define COMPONENTS_HTML_VIEWER_UI_SETUP_H_
 
 #include "base/basictypes.h"
 
+namespace gfx {
+class Size;
+}
+
 namespace html_viewer {
 
 // UISetup is intended for platform specific UI setup.
 class UISetup {
  public:
-  UISetup() {}
+  UISetup(const gfx::Size& screen_size_in_pixels, float device_pixel_ratio) {}
   ~UISetup() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UISetup);
 };
 
 }  // namespace html_viewer
 
 #endif  // COMPONENTS_HTML_VIEWER_UI_SETUP_H_