cc: Plumbing for storing property trees

cc/trees/layer_tree_host_common.h

Index: cc/trees/layer_tree_host_common.h
diff --git a/cc/trees/layer_tree_host_common.h b/cc/trees/layer_tree_host_common.h
index 404f407f008f9fdcc00bde62d643d40ca09b8beb..030d07a8adc1852aec32c692f37d7823b9d5245e 100644
--- a/cc/trees/layer_tree_host_common.h
+++ b/cc/trees/layer_tree_host_common.h
@@ -13,6 +13,7 @@
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
 #include "cc/layers/layer_lists.h"
+#include "cc/trees/property_tree.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/transform.h"
@@ -22,6 +23,7 @@ namespace cc {
 class LayerImpl;
 class Layer;
 class SwapPromise;
+class PropertyTrees;
 
 class CC_EXPORT LayerTreeHostCommon {
  public:
@@ -47,7 +49,8 @@ class CC_EXPORT LayerTreeHostCommon {
                         bool can_adjust_raster_scales,
                         bool verify_property_trees,
                         RenderSurfaceLayerListType* render_surface_layer_list,
-                        int current_render_surface_layer_list_id)
+                        int current_render_surface_layer_list_id,
+                        PropertyTrees* property_trees)
         : root_layer(root_layer),
           device_viewport_size(device_viewport_size),
           device_transform(device_transform),
@@ -65,7 +68,8 @@ class CC_EXPORT LayerTreeHostCommon {
           verify_property_trees(verify_property_trees),
           render_surface_layer_list(render_surface_layer_list),
           current_render_surface_layer_list_id(
-              current_render_surface_layer_list_id) {}
+              current_render_surface_layer_list_id),
+          property_trees(property_trees) {}
 
     LayerType* root_layer;
     gfx::Size device_viewport_size;
@@ -83,6 +87,7 @@ class CC_EXPORT LayerTreeHostCommon {
     bool verify_property_trees;
     RenderSurfaceLayerListType* render_surface_layer_list;
     int current_render_surface_layer_list_id;
+    PropertyTrees* property_trees;
   };
 
   template <typename LayerType, typename RenderSurfaceLayerListType>
@@ -100,6 +105,7 @@ class CC_EXPORT LayerTreeHostCommon {
 
    private:
     const gfx::Transform identity_transform_;
+    PropertyTrees property_trees;
   };
 
   typedef CalcDrawPropsInputs<Layer, RenderSurfaceLayerList>
@@ -251,7 +257,8 @@ LayerTreeHostCommon::CalcDrawPropsInputsForTesting<LayerType,
           false,
           true,
           render_surface_layer_list,
-          0) {
+          0,
+          &property_trees) {
   DCHECK(root_layer);
   DCHECK(render_surface_layer_list);
 }
@@ -279,7 +286,8 @@ LayerTreeHostCommon::CalcDrawPropsInputsForTesting<LayerType,
           false,
           true,
           render_surface_layer_list,
-          0) {
+          0,
+          &property_trees) {
   DCHECK(root_layer);
   DCHECK(render_surface_layer_list);
 }