cc: Compute sublayer scale from effect tree

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 "element_id.proto";
 import "rectf.proto";
 import "scroll_offset.proto";
 import "size.proto";
@@ skipping 67 matching lines @@
   optional int64 target_id = 5;
   optional bool applies_local_clip = 6;
   optional bool layer_clipping_uses_only_local_clip = 7;
   optional bool target_is_clipped = 8;
   optional bool layers_are_clipped = 9;
   optional bool layers_are_clipped_when_surfaces_disabled = 10;
   optional bool resets_clip = 11;
 }
 
 // Proto for struct EffectNodeData.
-// NEXT ID: 20
+// NEXT ID: 21
 message EffectNodeData {
   optional float opacity = 1;
   optional float screen_space_opacity = 2;
   optional bool has_render_surface = 3;
   optional bool has_copy_request = 4;
   optional bool hidden_by_backface_visibility = 14;
   optional bool double_sided = 13;
   optional bool is_drawn = 6;
   optional bool subtree_hidden = 15;
   optional bool has_potential_opacity_animation = 7;
   optional bool is_currently_animating_opacity = 16;
   optional bool effect_changed = 11;
   optional int64 num_copy_requests_in_subtree = 8;
   optional int64 transform_id = 9;
   optional int64 clip_id = 10;
   optional int64 target_id = 12;
   optional int64 mask_layer_id = 17;
   optional int64 replica_layer_id = 18;
   optional int64 replica_mask_layer_id = 19;
+  optional Vector2dF sublayer_scale = 20;
 }
 
 // Proto for struct ScrollNodeData
 // NEXT ID: 16
 message ScrollNodeData {
   optional bool scrollable = 1;
   optional int32 main_thread_scrolling_reasons = 2;
   optional bool contains_non_fast_scrollable_region = 3;
   optional Size scroll_clip_layer_bounds = 4;
   optional Size bounds = 5;
@@ skipping 92 matching lines @@
   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];
 }