Implement DRM Native Pixmap using prime buffer

ui/ozone/platform/caca/ozone_platform_caca.cc

 // Copyright 2014 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/caca/ozone_platform_caca.h"
 
 #include "base/macros.h"
 #include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
 #include "ui/events/ozone/layout/no/no_keyboard_layout_engine.h"
 #include "ui/ozone/common/native_display_delegate_ozone.h"
@@ skipping 44 matching lines @@
       const gfx::Rect& bounds) override {
     scoped_ptr<CacaWindow> caca_window(new CacaWindow(
         delegate, window_manager_.get(), event_source_.get(), bounds));
     if (!caca_window->Initialize())
       return nullptr;
     return std::move(caca_window);
   }
   scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
     return make_scoped_ptr(new NativeDisplayDelegateOzone());
   }
-  base::ScopedFD OpenClientNativePixmapDevice() const override {
-    return base::ScopedFD();
-  }
 
   void InitializeUI() override {
     window_manager_.reset(new CacaWindowManager);
     overlay_manager_.reset(new StubOverlayManager());
     event_source_.reset(new CacaEventSource());
     cursor_factory_ozone_.reset(new CursorFactoryOzone());
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
     input_controller_ = CreateStubInputController();
     KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(
         make_scoped_ptr(new NoKeyboardLayoutEngine()));
@@ skipping 15 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformCaca);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformCaca() {
   return new OzonePlatformCaca;
 }
 
 }  // namespace ui