Move logic from ImageTransportSurfaceOverlayMac into ui/

ui/accelerated_widget_mac/ca_renderer_layer_tree.h

 // Copyright 2016 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_ACCELERATED_WIDGET_MAC_CA_LAYER_TREE_MAC_H_
-#define UI_ACCELERATED_WIDGET_MAC_CA_LAYER_TREE_MAC_H_
+#ifndef UI_ACCELERATED_WIDGET_MAC_CA_RENDERER_LAYER_TREE_H_
+#define UI_ACCELERATED_WIDGET_MAC_CA_RENDERER_LAYER_TREE_H_
 
 #include <IOSurface/IOSurface.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include <deque>
 #include <memory>
 #include <vector>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
 #include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/mac/io_surface.h"
 #include "ui/gfx/transform.h"
 
 @class AVSampleBufferDisplayLayer;
 
 namespace ui {
 
-// The CALayerTree will construct a hierarchy of CALayers from a linear list,
-// using the algorithm and structure referenced described in
+// The CARendererLayerTree will construct a hierarchy of CALayers from a linear
+// list provided by the CoreAnimation renderer using the algorithm and structure
+// referenced described in
 // https://docs.google.com/document/d/1DtSN9zzvCF44_FQPM7ie01UxGHagQ66zfF5L9HnigQY/edit?usp=sharing
-class ACCELERATED_WIDGET_MAC_EXPORT CALayerTree {
+class ACCELERATED_WIDGET_MAC_EXPORT CARendererLayerTree {
  public:
-  CALayerTree();
+  CARendererLayerTree();
 
   // This will remove all CALayers from this tree from their superlayer.
-  ~CALayerTree();
+  ~CARendererLayerTree();
 
   // Append the description of a new CALayer to the tree. This will not
   // create any new CALayers until CommitScheduledCALayers is called. This
   // cannot be called anymore after CommitScheduledCALayers has been called.
   bool ScheduleCALayer(bool is_clipped,
                        const gfx::Rect& clip_rect,
                        unsigned sorting_context_id,
                        const gfx::Transform& transform,
                        base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
                        base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer,
                        const gfx::RectF& contents_rect,
                        const gfx::Rect& rect,
                        unsigned background_color,
                        unsigned edge_aa_mask,
                        float opacity);
 
   // Create a CALayer tree for the scheduled layers, and set |superlayer| to
   // have only this tree as its sublayers. If |old_tree| is non-null, then try
   // to re-use the CALayers of |old_tree| as much as possible. |old_tree| will
   // be destroyed at the end of the function, and any CALayers in it which were
   // not re-used by |this| will be removed from the CALayer hierarchy.
   void CommitScheduledCALayers(CALayer* superlayer,
-                               std::unique_ptr<CALayerTree> old_tree,
+                               std::unique_ptr<CARendererLayerTree> old_tree,
                                float scale_factor);
 
  private:
   struct RootLayer;
   struct ClipAndSortingLayer;
   struct TransformLayer;
   struct ContentLayer;
 
   struct RootLayer {
     RootLayer();
@@ skipping 128 matching lines @@
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ContentLayer);
   };
 
   RootLayer root_layer_;
   float scale_factor_ = 1;
   bool has_committed_ = false;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(CALayerTree);
+  DISALLOW_COPY_AND_ASSIGN(CARendererLayerTree);
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCELERATED_WIDGET_MAC_CA_LAYER_TREE_MAC_H_