cc: Move RenderTarget Information to Effect Tree

cc/trees/layer_tree_host_common.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_TREES_LAYER_TREE_HOST_COMMON_H_
 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_
 
 #include <stddef.h>
 
 #include <limits>
@@ skipping 169 matching lines @@
   bool EqualsForTesting(const ScrollAndScaleSet& other) const;
   void ToProtobuf(proto::ScrollAndScaleSet* proto) const;
   void FromProtobuf(const proto::ScrollAndScaleSet& proto);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScrollAndScaleSet);
 };
 
 template <typename LayerType>
 bool LayerTreeHostCommon::RenderSurfaceContributesToTarget(
     LayerType* layer,

[ajuma, 2016/04/07 21:59:55]

Note for future cleanup: this can be detemplatized.

     int target_surface_layer_id) {
   // A layer will either contribute its own content, or its render surface's
   // content, to the target surface. The layer contributes its surface's content
   // when both the following are true:
   //  (1) The layer actually has a render surface and rendering into that
   //      surface, and
   //  (2) The layer's render surface is not the same as the target surface.
   //
   // Otherwise, the layer just contributes itself to the target surface.
 
-  return layer->render_target() == layer &&
+  return layer->has_render_surface() &&
+         layer->render_target() == layer->render_surface() &&
          layer->id() != target_surface_layer_id;
 }
 
 template <typename LayerType, typename Function>
 static void CallFunctionForLayer(LayerType* layer, const Function& function) {
   function(layer);
 
   if (LayerType* mask_layer = layer->mask_layer())
     function(mask_layer);
   if (LayerType* replica_layer = layer->replica_layer()) {
@@ skipping 25 matching lines @@
   for (auto* layer : *host_impl)
     CallFunctionForLayer(layer, function);
 }
 
 CC_EXPORT PropertyTrees* GetPropertyTrees(Layer* layer);
 CC_EXPORT PropertyTrees* GetPropertyTrees(LayerImpl* layer);
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_COMMON_H_