ozone: Add atomic initialization path

ui/ozone/platform/drm/gpu/hardware_display_plane_atomic.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 UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_PLANE_ATOMIC_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_PLANE_ATOMIC_H_
 
 #include "ui/ozone/platform/drm/gpu/hardware_display_plane.h"
 
 #include <xf86drmMode.h>
 
 namespace ui {
 
+class CrtcController;
 class DrmDevice;
 
 class HardwareDisplayPlaneAtomic : public HardwareDisplayPlane {
  public:
   HardwareDisplayPlaneAtomic(uint32_t plane_id, uint32_t possible_crtcs);
   ~HardwareDisplayPlaneAtomic() override;
 
   bool SetPlaneData(drmModePropertySet* property_set,
                     uint32_t crtc_id,
                     uint32_t framebuffer,
                     const gfx::Rect& crtc_rect,
                     const gfx::Rect& src_rect);
 
   // HardwareDisplayPlane:
   bool Initialize(DrmDevice* drm) override;
 
+  void set_crtc(CrtcController* crtc) { crtc_ = crtc; }

[dnicoara, 2015/05/19 19:36:20]

As a separate change, could you go over
HardwareDisplayPlane{List,Atomic,Legacy,Manager} and refactor the logic to share
more code and provide a more consistent design? For example, the legacy path
uses a PageFlipInfo struct owned inside HDPList while the atomic path relies on
inheritance.

+  CrtcController* crtc() const { return crtc_; }
+
  private:
   struct Property {
     Property();
     bool Initialize(DrmDevice* drm,
                     const char* name,
                     const ScopedDrmObjectPropertyPtr& plane_properties);
     uint32_t id;
   };
 
   Property crtc_prop_;
   Property fb_prop_;
   Property crtc_x_prop_;
   Property crtc_y_prop_;
   Property crtc_w_prop_;
   Property crtc_h_prop_;
   Property src_x_prop_;
   Property src_y_prop_;
   Property src_w_prop_;
   Property src_h_prop_;
+  CrtcController* crtc_;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_HARDWARE_DISPLAY_PLANE_ATOMIC_H_