Further plumb visual rect into cc:DisplayItemList.

ui/compositor/paint_context.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_COMPOSITOR_PAINT_CONTEXT_H_
 #define UI_COMPOSITOR_PAINT_CONTEXT_H_
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/compositor/compositor_export.h"
@@ skipping 60 matching lines @@
   // The Recorder classes need access to the internal canvas and friends, but we
   // don't want to expose them on this class so that people must go through the
   // recorders to access them.
   friend class ClipTransformRecorder;
   friend class CompositingRecorder;
   friend class PaintRecorder;
   // The Cache class also needs to access the DisplayItemList to append its
   // cache contents.
   friend class PaintCache;
 
+  // Returns a rect with the given size in the space of the context's
+  // containing layer.
+  gfx::Rect ToLayerSpaceBounds(const gfx::Size& size_in_layer) const;
+
+  // Returns the given rect translated by the layer space offset.
+  gfx::Rect ToLayerSpaceRect(const gfx::Rect& rect) const;
+
   cc::DisplayItemList* list_;
   scoped_ptr<SkPictureRecorder> owned_recorder_;
   // A pointer to the |owned_recorder_| in this PaintContext, or in another one
   // which this was copied from. We expect a copied-from PaintContext to outlive
   // copies made from it.
   SkPictureRecorder* recorder_;
   // The device scale of the frame being painted. Used to determine which bitmap
   // resources to use in the frame.
   float device_scale_factor_;
   // Invalidation in the space of the paint root (ie the space of the layer
@@ skipping 11 matching lines @@
   // recorder is active.
   mutable bool inside_paint_recorder_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PaintContext);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_PAINT_CONTEXT_H_