cc: Move RenderTarget Information to Effect Tree

cc/layers/layer_impl.h

 // Copyright 2011 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_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 340 matching lines @@
   // These invalidate the host's render surface layer list.  The caller
   // is responsible for calling set_needs_update_draw_properties on the tree
   // so that its list can be recreated.
   void ClearRenderSurfaceLayerList();
   void SetHasRenderSurface(bool has_render_surface);
 
   void SetForceRenderSurface(bool has_render_surface);
 
   RenderSurfaceImpl* render_surface() const { return render_surface_.get(); }
 
+  // The render surface which this layer draws into. This can be either owned by
+  // the same layer or an ancestor of this layer.
+  RenderSurfaceImpl* render_target();
+  const RenderSurfaceImpl* render_target() const;
+
   DrawProperties& draw_properties() { return draw_properties_; }
   const DrawProperties& draw_properties() const { return draw_properties_; }
 
   gfx::Transform DrawTransform() const;
   gfx::Transform ScreenSpaceTransform() const;
   PerformanceProperties<LayerImpl>& performance_properties() {
     return performance_properties_;
   }
 
   // Setter for draw_properties_.
@@ skipping 11 matching lines @@
     return draw_properties_.screen_space_transform_is_animating;
   }
   bool can_use_lcd_text() const { return draw_properties_.can_use_lcd_text; }
   gfx::Rect clip_rect() const { return draw_properties_.clip_rect; }
   gfx::Rect drawable_content_rect() const {
     return draw_properties_.drawable_content_rect;
   }
   gfx::Rect visible_layer_rect() const {
     return draw_properties_.visible_layer_rect;
   }
-  LayerImpl* render_target() {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-  const LayerImpl* render_target() const {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-
   size_t num_unclipped_descendants() const {
     return draw_properties_.num_unclipped_descendants;
   }
 
   // The client should be responsible for setting bounds, content bounds and
   // contents scale to appropriate values. LayerImpl doesn't calculate any of
   // them from the other values.
 
   void SetBounds(const gfx::Size& bounds);
   gfx::Size bounds() const;
@@ skipping 353 matching lines @@
   bool layer_or_descendant_is_drawn_;
   // If true, the layer or one of its descendants has a touch handler.
   bool layer_or_descendant_has_touch_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_