ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/public/client_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_CLIENT_NATIVE_PIXMAP_MANAGER_H_
 #define UI_OZONE_PUBLIC_CLIENT_NATIVE_PIXMAP_MANAGER_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 10 matching lines @@
 
 namespace ui {
 
 // The Ozone interface allows external implementations to hook into Chromium to
 // provide a client pixmap for non-GPU processes.
 class OZONE_EXPORT ClientNativePixmapManager {
  public:
   static ClientNativePixmapManager* GetInstance();
   static void SetInstance(ClientNativePixmapManager* instance);
 
-  static scoped_ptr<ClientNativePixmapManager> Create();
+  static scoped_ptr<ClientNativePixmapManager> Create(
+      const base::FileDescriptor& virtual_device);
 
   virtual ~ClientNativePixmapManager();
 
   struct Configuration {
     NativePixmapFormat format;
     NativePixmapUsage usage;
   };
 
   // Gets supported format/usage configurations.
   virtual std::vector<Configuration> GetSupportedConfigurations() const = 0;
 
   // TODO(dshwang): implement it. crbug.com/475633
   // Import the native pixmap from |handle| to be used in non-GPU processes.
   virtual scoped_ptr<ClientNativePixmap> ImportClientNativePixmap(
       base::FileDescriptor handle,
       gfx::Size size,
       NativePixmapFormat format,
       NativePixmapUsage usage) = 0;
 
  protected:
   ClientNativePixmapManager();
 
+  virtual void Initialize(const base::FileDescriptor& virtual_device) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_CLIENT_NATIVE_PIXMAP_MANAGER_H_