ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

content/browser/gpu/browser_native_pixmap_manager_ozone.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 CONTENT_BROWSER_GPU_BROWSER_NATIVE_PIXMAP_MANAGER_OZONE_H_
+#define CONTENT_BROWSER_GPU_BROWSER_NATIVE_PIXMAP_MANAGER_OZONE_H_
+
+#include "base/file_descriptor_posix.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/ozone/public/native_pixmap_manager.h"
+
+namespace content {
+class BrowserMessageFilter;
+
+class BrowserNativePixmapManager : public ui::NativePixmapManager {
+ public:
+  static BrowserNativePixmapManager* GetInstance();
+  ~BrowserNativePixmapManager() override;
+
+  // Create message filter to handle messages from child process.
+  BrowserMessageFilter* CreateMessageFilter();
+
+  typedef base::Callback<void(const base::FileDescriptor& fd)>
+      FileDescriptorCallback;
+  void GetVirtualDeviceForChildProcess(const FileDescriptorCallback& callback);
+
+  // ui::NativePixmapManager:
+  void Initialize(const base::FileDescriptor& device_fd) override;
+  std::vector<Configuration> GetSupportedNativePixmapConfigurations()
+      const override;
+
+ private:
+  friend struct BrowserNativePixmapManagerTrait;
+  BrowserNativePixmapManager();
+
+  scoped_ptr<ui::NativePixmapManager> pixmap_manager_;
+  base::FileDescriptor device_fd_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserNativePixmapManager);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GPU_BROWSER_NATIVE_PIXMAP_MANAGER_OZONE_H_