cc: Move UnoccludedContentRect to Occlusion.

cc/trees/occlusion_tracker.h

 // Copyright 2012 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 CC_TREES_OCCLUSION_TRACKER_H_
 #define CC_TREES_OCCLUSION_TRACKER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/simple_enclosed_region.h"
 #include "cc/layers/layer_iterator.h"
 #include "cc/trees/occlusion.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 class LayerImpl;
 class Region;
 class RenderSurfaceImpl;
 class Layer;
 class RenderSurface;
 
 // This class is used to track occlusion of layers while traversing them in a
 // front-to-back order. As each layer is visited, one of the methods in this
 // class is called to notify it about the current target surface. Then,
 // occlusion in the content space of the current layer may be queried, via
-// methods such UnoccludedContentRect(), or using Occlusion from
-// GetCurrentOcclusionForLayer. If the current layer owns a RenderSurfaceImpl,
-// then occlusion on that RenderSurfaceImpl may also be queried via
-// surfaceOccluded() and surfaceUnoccludedContentRect(). Finally, once finished
-// with the layer, occlusion behind the layer should be marked by calling
-// MarkOccludedBehindLayer().
+// Occlusion from GetCurrentOcclusionForLayer(). If the current layer owns a
+// RenderSurfaceImpl, then occlusion on that RenderSurfaceImpl may also be
+// queried via surfaceOccluded() and surfaceUnoccludedContentRect(). Finally,
+// once finished with the layer, occlusion behind the layer should be marked by
+// calling MarkOccludedBehindLayer().
 template <typename LayerType>
 class CC_EXPORT OcclusionTracker {
  public:
   explicit OcclusionTracker(const gfx::Rect& screen_space_clip_rect);
   ~OcclusionTracker();
 
   // Return an occlusion that retains the current state of the tracker
   // and can be used outside of a layer walk to check occlusion.
   Occlusion GetCurrentOcclusionForLayer(
       const gfx::Transform& draw_transform) const;
 
   // Called at the beginning of each step in the LayerIterator's front-to-back
   // traversal.
   void EnterLayer(const LayerIteratorPosition<LayerType>& layer_iterator);
   // Called at the end of each step in the LayerIterator's front-to-back
   // traversal.
   void LeaveLayer(const LayerIteratorPosition<LayerType>& layer_iterator);
 
-  // Gives an unoccluded sub-rect of |content_rect| in the content space of a
-  // layer. Used when considering occlusion for a layer that paints/draws
-  // something. |render_target| is the contributing layer's render target, and
-  // |draw_transform| and |impl_draw_transform_is_unknown| are relative to that.
-  gfx::Rect UnoccludedContentRect(const gfx::Rect& content_rect,
-                                  const gfx::Transform& draw_transform) const;
-
   // Gives an unoccluded sub-rect of |content_rect| in the content space of the
   // render_target owned by the layer. Used when considering occlusion for a
   // contributing surface that is rendering into another target.
   gfx::Rect UnoccludedContributingSurfaceContentRect(
       const gfx::Rect& content_rect,
       const gfx::Transform& draw_transform) const;
 
   // Gives the region of the screen that is not occluded by something opaque.
   Region ComputeVisibleRegionInScreen() const;
 
@@ skipping 67 matching lines @@
 };
 
 #if !defined(COMPILER_MSVC)
 extern template class OcclusionTracker<Layer>;
 extern template class OcclusionTracker<LayerImpl>;
 #endif
 
 }  // namespace cc
 
 #endif  // CC_TREES_OCCLUSION_TRACKER_H_