ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/common/stub_client_native_pixmap_manager.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/common/stub_client_native_pixmap_manager.h"
 
 #include "base/file_descriptor_posix.h"
 
 namespace ui {
 
 namespace {
 
 class StubClientNativePixmapManager : public ClientNativePixmapManager {
  public:
   StubClientNativePixmapManager() {}
-  ~StubClientNativePixmapManager() override {}
+  ~StubClientNativePixmapManager() override {
+    if (virtual_device_.auto_close) {
+      base::ScopedFD closing_fd(virtual_device_.fd);
+    }
+  }
 
   // ClientNativePixmapManager:
   std::vector<Configuration> GetSupportedConfigurations() const override {
     return std::vector<Configuration>();
   }
   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(virtual_device_.fd, -1);
+    if (virtual_device.fd >= 0)
+      virtual_device_ = virtual_device;
+  }
+
+  base::FileDescriptor virtual_device_;
+
   DISALLOW_COPY_AND_ASSIGN(StubClientNativePixmapManager);
 };
 
 }  // namespace
 
 ClientNativePixmapManager* CreateStubClientNativePixmapManager() {
   return new StubClientNativePixmapManager;
 }
 
 }  // namespace ui