ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/common/stub_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_native_pixmap_manager.h"
 
 namespace ui {
 
 namespace {
 
 class StubNativePixmapManager : public NativePixmapManager {
  public:
   StubNativePixmapManager() {}
   ~StubNativePixmapManager() override {}
 
+  void Initialize(const base::FileDescriptor& device_fd) override {}
+
   std::vector<Configuration> GetSupportedNativePixmapConfigurations()
       const override {
     return std::vector<Configuration>();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StubNativePixmapManager);
 };
 
 }  // namespace
 
 NativePixmapManager* CreateStubNativePixmapManager() {
   return new StubNativePixmapManager;
 }
 
 }  // namespace ui