Implement HiDPI support in Pepper dev interface

ppapi/shared_impl/ppb_view_shared.h

 // Copyright (c) 2012 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 PPAPI_SHARED_IMPL_PPB_VIEW_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_VIEW_SHARED_H_
 
 #include "base/compiler_specific.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_view_api.h"
 
 namespace ppapi {
 
 // If you add to this struct, be sure to update the serialization in
 // ppapi_messages.h.
 struct PPAPI_SHARED_EXPORT ViewData {
   ViewData();
   ~ViewData();
 
   bool Equals(const ViewData& other) const;
 
   PP_Rect rect;
   bool is_fullscreen;
   bool is_page_visible;
   PP_Rect clip_rect;
+  float device_scale;
+  float css_scale;
 };
 
 class PPAPI_SHARED_EXPORT PPB_View_Shared
     : public Resource,
       public thunk::PPB_View_API {
  public:
   PPB_View_Shared(ResourceObjectType type,
                   PP_Instance instance,
                   const ViewData& data);
   virtual ~PPB_View_Shared();
 
   // Resource overrides.
   virtual thunk::PPB_View_API* AsPPB_View_API() OVERRIDE;
 
   // PPB_View_API implementation.
   virtual const ViewData& GetData() const OVERRIDE;
 
  private:
   ViewData data_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_View_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_VIEW_SHARED_H_