cc: Commit property trees to the compositor thread

cc/trees/property_tree_builder.h

Index: cc/trees/property_tree_builder.h
diff --git a/cc/trees/property_tree_builder.h b/cc/trees/property_tree_builder.h
index 0635e3b4753a0397bee9ac2e62ed7b9d78c20171..15f326ef15c56f143595a7bab47a466987702827 100644
--- a/cc/trees/property_tree_builder.h
+++ b/cc/trees/property_tree_builder.h
@@ -25,6 +25,13 @@ class PropertyTreeBuilder {
                                  const gfx::Rect& viewport,
                                  const gfx::Transform& device_transform,
                                  PropertyTrees* property_trees);
+  static void BuildPropertyTrees(LayerImpl* root_layer,
+                                 const LayerImpl* page_scale_layer,
+                                 float page_scale_factor,
+                                 float device_scale_factor,
+                                 const gfx::Rect& viewport,
+                                 const gfx::Transform& device_transform,
+                                 PropertyTrees* property_trees);
 };
 
 }  // namespace cc