ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/public/ozone_platform.h

 // Copyright 2014 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_OZONE_PLATFORM_H_
 #define UI_OZONE_PUBLIC_OZONE_PLATFORM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/ozone/ozone_export.h"
 
+namespace base {
+struct FileDescriptor;
+}
+
 namespace gfx {
 class Rect;
 }
 
 namespace ui {
 
 class CursorFactoryOzone;
 class InputController;
 class GpuPlatformSupport;
 class GpuPlatformSupportHost;
@@ skipping 40 matching lines @@
   virtual ui::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
   virtual ui::InputController* GetInputController() = 0;
   virtual ui::GpuPlatformSupport* GetGpuPlatformSupport() = 0;
   virtual ui::GpuPlatformSupportHost* GetGpuPlatformSupportHost() = 0;
   virtual scoped_ptr<SystemInputInjector> CreateSystemInputInjector() = 0;
   virtual scoped_ptr<PlatformWindow> CreatePlatformWindow(
       PlatformWindowDelegate* delegate,
       const gfx::Rect& bounds) = 0;
   virtual scoped_ptr<ui::NativeDisplayDelegate>
       CreateNativeDisplayDelegate() = 0;
+  // Return virtual device file descriptor for the unprivileged API.
+  virtual base::FileDescriptor GetVirtualDeviceFd() = 0;
 
  private:
   virtual void InitializeUI() = 0;
   virtual void InitializeGPU() = 0;
 
   static void CreateInstance();
 
   static OzonePlatform* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(OzonePlatform);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_OZONE_PLATFORM_H_