Implement DRM Native Pixmap using prime buffer

ui/ozone/platform/cast/ozone_platform_cast.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/cast/ozone_platform_cast.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 56 matching lines @@
   }
   scoped_ptr<PlatformWindow> CreatePlatformWindow(
       PlatformWindowDelegate* delegate,
       const gfx::Rect& bounds) override {
     return make_scoped_ptr<PlatformWindow>(
         new PlatformWindowCast(delegate, bounds));
   }
   scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
     return make_scoped_ptr(new NativeDisplayDelegateOzone());
   }
-  base::ScopedFD OpenClientNativePixmapDevice() const override {
-    return base::ScopedFD();
-  }
 
   void InitializeUI() override {
     overlay_manager_.reset(new OverlayManagerCast());
     cursor_factory_.reset(new CursorFactoryOzone());
     input_controller_ = CreateStubInputController();
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
 
     // Enable dummy software rendering support if GPU process disabled
     // or if we're an audio-only build.
     // Note: switch is kDisableGpu from content/public/common/content_switches.h
@@ skipping 27 matching lines @@
 
 OzonePlatform* CreateOzonePlatformCast() {
   const std::vector<std::string>& argv =
       base::CommandLine::ForCurrentProcess()->argv();
   scoped_ptr<chromecast::CastEglPlatform> platform(
       chromecast::CastEglPlatformShlib::Create(argv));
   return new OzonePlatformCast(std::move(platform));
 }
 
 }  // namespace ui