cc: Put to_target and to_screen behind an accessor.

cc/proto/property_tree.proto

 // Copyright 2015 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.
 
 syntax = "proto2";
 
 import "rectf.proto";
 import "scroll_offset.proto";
 import "size.proto";
 import "synced_property.proto";
 import "transform.proto";
 import "vector2df.proto";
 
 option optimize_for = LITE_RUNTIME;
 
 package cc.proto;
 
 // The messages declared in this file correspond to the classes declared in
 // cc/trees/property_tree.h
 
 // Proto for struct TransformNodeData.
 // NEXT ID: 43
 message TranformNodeData {
   optional Transform pre_local = 1;
   optional Transform local = 2;
   optional Transform post_local = 3;
   optional Transform to_parent = 4;
-  optional Transform to_target = 5;
-  optional Transform from_target = 6;
-  optional Transform to_screen = 7;
-  optional Transform from_screen = 8;
 
-  optional int64 target_id = 9;
-  optional int64 content_target_id = 10;
   optional int64 source_node_id = 11;
   optional bool needs_local_transform_update = 12;
   optional bool node_and_ancestors_are_animated_or_invertible = 41;
   optional bool is_invertible = 13;
   optional bool ancestors_are_invertible = 14;
   optional bool has_potential_animation = 15;
   optional bool is_currently_animating = 42;
   optional bool to_screen_is_potentially_animated = 16;
   optional bool has_only_translation_animations = 17;
   optional bool to_screen_has_scale_animation = 18;
@@ skipping 15 matching lines @@
   optional float combined_starting_animation_scale = 33;
 
   optional Vector2dF sublayer_scale = 34;
   optional ScrollOffset scroll_offset = 35;
   optional Vector2dF scroll_snap = 36;
   optional Vector2dF source_offset = 37;
   optional Vector2dF source_to_parent = 38;
   optional int64 sorting_context_id = 39;
 }
 
+// Proto for TransformCachedNodeData
+message TransformCachedNodeData {
+  optional Transform from_target = 1;
+  optional Transform to_target = 2;
+  optional Transform from_screen = 3;
+  optional Transform to_screen = 4;
+  optional int64 target_id = 5;
+  optional int64 content_target_id = 6;
+}
+
 // Proto for struct ClipNodeData.
 // NEXT ID: 12
 message ClipNodeData {
   optional RectF clip = 1;
   optional RectF combined_clip_in_target_space = 2;
   optional RectF clip_in_target_space = 3;
 
   optional int64 transform_id = 4;
   optional int64 target_id = 5;
   optional bool applies_local_clip = 6;
@@ skipping 98 matching lines @@
 // Proto for data members of class TransformTree.
 message TransformTreeData {
   optional bool source_to_parent_updates_allowed = 1;
   optional float page_scale_factor = 2;
   optional float device_scale_factor = 3;
   optional float device_transform_scale_factor = 4;
   repeated int64 nodes_affected_by_inner_viewport_bounds_delta = 7
       [packed = true];
   repeated int64 nodes_affected_by_outer_viewport_bounds_delta = 8
       [packed = true];
+  repeated TransformCachedNodeData cached_data = 9;
 }
 
 // Proto for class PropertyTrees.
 // NEXT ID: 16
 message PropertyTrees {
   optional PropertyTree transform_tree = 1;
   optional PropertyTree effect_tree = 2;
   optional PropertyTree clip_tree = 3;
   optional PropertyTree scroll_tree = 7;
 
   optional bool needs_rebuild = 4;
   optional bool non_root_surfaces_enabled = 5;
   optional bool changed = 11;
   optional bool full_tree_damaged = 12;
   optional int64 sequence_number = 6;
   optional bool is_main_thread = 13;
   optional bool is_active = 14;
 
   optional Vector2dF inner_viewport_container_bounds_delta = 8;
   optional Vector2dF outer_viewport_container_bounds_delta = 9;
   optional Vector2dF inner_viewport_scroll_bounds_delta = 10;
   repeated int64 always_use_active_tree_opacity_effect_ids = 15 [packed = true];
 }