ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/public/ozone_platform.h

Index: ui/ozone/public/ozone_platform.h
diff --git a/ui/ozone/public/ozone_platform.h b/ui/ozone/public/ozone_platform.h
index 590104b8428a8145afcb8c0f8da5a4a2e95ed591..e4a7bca45fc37d8d70be6208c04eb76ebdd9ae92 100644
--- a/ui/ozone/public/ozone_platform.h
+++ b/ui/ozone/public/ozone_platform.h
@@ -5,6 +5,7 @@
 #ifndef UI_OZONE_PUBLIC_OZONE_PLATFORM_H_
 #define UI_OZONE_PUBLIC_OZONE_PLATFORM_H_
 
+#include "base/files/scoped_file.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/ozone/ozone_export.h"
 
@@ -68,6 +69,9 @@ class OZONE_EXPORT OzonePlatform {
       const gfx::Rect& bounds) = 0;
   virtual scoped_ptr<ui::NativeDisplayDelegate>
       CreateNativeDisplayDelegate() = 0;
+  // Open ClientNativePixmap device file for non-GPU processes to import a
+  // ClientNativePixmap.
+  virtual base::ScopedFD OpenClientNativePixmapDevice() const = 0;
 
  private:
   virtual void InitializeUI() = 0;