ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/public/native_pixmap_manager.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 UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_
 #define UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_
 
 #include <vector>
 
 #include "ui/ozone/ozone_export.h"
 #include "ui/ozone/public/surface_factory_ozone.h"
 
+namespace base {
+
+struct FileDescriptor;
+
+}  // namespace base
+
 namespace ui {
 
 // The Ozone interface allows external implementations to hook into Chromium to
 // provide the handle of a native surface for Browser and Render process.
 class OZONE_EXPORT NativePixmapManager {
  public:
   static NativePixmapManager* GetInstance();
-  static void SetInstance(scoped_ptr<NativePixmapManager> instance);
+  static void SetInstance(NativePixmapManager* instance);
 
-  static scoped_ptr<NativePixmapManager> Create();
+  static scoped_ptr<NativePixmapManager> Create(
+      const base::FileDescriptor& device_fd);
 
   virtual ~NativePixmapManager();
 
   struct Configuration {
     SurfaceFactoryOzone::BufferFormat format;
     SurfaceFactoryOzone::BufferUsage usage;
   };
 
   // Gets supported format/usage configurations.
   virtual std::vector<Configuration> GetSupportedNativePixmapConfigurations()
       const = 0;
 
  protected:
   NativePixmapManager();
 
+  virtual void Initialize(const base::FileDescriptor& device_fd) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(NativePixmapManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_