ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.cc

 // 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.
 
 #include "ui/ozone/platform/drm/common/client_native_pixmap_manager_gbm.h"
 
 #include "base/file_descriptor_posix.h"
 #include "ui/ozone/public/client_native_pixmap_manager.h"
 
 namespace ui {
 
 namespace {
 
 class ClientNativePixmapManagerGbm : public ClientNativePixmapManager {
  public:
   ClientNativePixmapManagerGbm() {}
-  ~ClientNativePixmapManagerGbm() override {}
+  ~ClientNativePixmapManagerGbm() override {
+    if (vgem_fd_.auto_close) {
+      base::ScopedFD closing_fd(vgem_fd_.fd);
+    }
+  }
 
   // ClientNativePixmapManager:
   std::vector<Configuration> GetSupportedConfigurations() const override {
     std::vector<Configuration> configurations = {
         {NATIVE_PIXMAP_FORMAT_BGRA_8888, NATIVE_PIXMAP_USAGE_SCANOUT},
         {NATIVE_PIXMAP_FORMAT_RGBX_8888, NATIVE_PIXMAP_USAGE_SCANOUT}};
     return configurations;
   }
   scoped_ptr<ClientNativePixmap> ImportClientNativePixmap(
       base::FileDescriptor handle,
       gfx::Size size,
       NativePixmapFormat format,
       NativePixmapUsage usage) override {
     NOTIMPLEMENTED();
     return nullptr;
   }
 
  private:
+  void Initialize(const base::FileDescriptor& virtual_device) override {
+    DCHECK_EQ(vgem_fd_.fd, -1);
+    if (virtual_device.fd >= 0)
+      vgem_fd_ = virtual_device;
+  }
+
+  base::FileDescriptor vgem_fd_;
+
   DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapManagerGbm);
 };
 
 }  // namespace
 
 ClientNativePixmapManager* CreateClientNativePixmapManagerGbm() {
   return new ClientNativePixmapManagerGbm();
 }
 
 }  // namespace ui