[M55] Generalize layer mirroring for phantom windows

components/exo/surface.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 COMPONENTS_EXO_SURFACE_H_
 #define COMPONENTS_EXO_SURFACE_H_
 
 #include <list>
 #include <memory>
 #include <set>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "cc/resources/transferable_resource.h"
 #include "cc/surfaces/surface_factory_client.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/compositor.h"
-#include "ui/compositor/layer_owner_delegate.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace base {
 namespace trace_event {
 class TracedValue;
 }
 }
 
 namespace cc {
 class SurfaceFactory;
@@ skipping 47 matching lines @@
                      std::unique_ptr<cc::SingleReleaseCallback>>>
       release_callbacks_;
   cc::FrameSinkId frame_sink_id_;
   std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
   std::unique_ptr<cc::SurfaceFactory> surface_factory_;
   Surface* surface_ = nullptr;
 };
 
 // This class represents a rectangular area that is displayed on the screen.
 // It has a location, size and pixel contents.
-class Surface : public ui::LayerOwnerDelegate,
-                public ui::ContextFactoryObserver {
+class Surface : public ui::ContextFactoryObserver {
  public:
   using PropertyDeallocator = void (*)(int64_t value);
 
   Surface();
   ~Surface() override;
 
   // Type-checking downcast routine.
   static Surface* AsSurface(const aura::Window* window);
 
   aura::Window* window() { return window_.get(); }
@@ skipping 99 matching lines @@
   void RemoveSurfaceObserver(SurfaceObserver* observer);
   bool HasSurfaceObserver(const SurfaceObserver* observer) const;
 
   // Returns a trace value representing the state of the surface.
   std::unique_ptr<base::trace_event::TracedValue> AsTracedValue() const;
 
   bool HasPendingDamageForTesting(const gfx::Rect& damage) const {
     return pending_damage_.contains(gfx::RectToSkIRect(damage));
   }
 
-  // Overridden from ui::LayerOwnerDelegate:
-  void OnLayerRecreated(ui::Layer* old_layer, ui::Layer* new_layer) override;
-
   // Overridden from ui::ContextFactoryObserver.
   void OnLostResources() override;
 
   void WillDraw(const cc::LocalFrameId& local_frame_id);
 
   // Check whether this Surface and its children need to create new cc::Surface
   // IDs for their contents next time they get new buffer contents.
   void CheckIfSurfaceHierarchyNeedsCommitToNewSurfaces();
 
   gfx::Size content_size() const { return content_size_; }
@@ skipping 175 matching lines @@
 
   // Surface observer list. Surface does not own the observers.
   base::ObserverList<SurfaceObserver, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SURFACE_H_