ozone: fix HDPMLegacy - do the PF after overlays, also clear old overlays

ui/ozone/platform/dri/hardware_display_plane_manager.h

 // 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.
 
 #ifndef UI_OZONE_PLATFORM_DRI_HARDWARE_DISPLAY_PLANE_MANAGER_H_
 #define UI_OZONE_PLATFORM_DRI_HARDWARE_DISPLAY_PLANE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <xf86drmMode.h>
@@ skipping 46 matching lines @@
       int plane;
       int framebuffer;
       gfx::Rect bounds;
       gfx::Rect src_rect;
     };
     std::vector<Plane> planes;
   };
   // In the case of non-atomic operation, this info will be used for
   // pageflipping.
   std::vector<PageFlipInfo> legacy_page_flips;
+
+  // Set if the last operation on this list was a Commit().
+  bool committed;
 };
 
 class HardwareDisplayPlaneManager {
  public:
   HardwareDisplayPlaneManager();
   virtual ~HardwareDisplayPlaneManager();
 
   // This parses information from the drm driver, adding any new planes
   // or crtcs found.
   bool Initialize(DriWrapper* drm);
@@ skipping 35 matching lines @@
 
   ScopedVector<HardwareDisplayPlane> planes_;
   std::vector<uint32_t> crtcs_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareDisplayPlaneManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_HARDWARE_DISPLAY_PLANE_MANAGER_H_