cc: Compute animation scale on demand

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";
@@ skipping 30 matching lines @@
   optional bool node_and_ancestors_have_only_integer_translation = 21;
   optional bool scrolls = 22;
   optional bool needs_sublayer_scale = 23;
   optional bool affected_by_inner_viewport_bounds_delta_x = 24;
   optional bool affected_by_inner_viewport_bounds_delta_y = 25;
   optional bool affected_by_outer_viewport_bounds_delta_x = 26;
   optional bool affected_by_outer_viewport_bounds_delta_y = 27;
   optional bool in_subtree_of_page_scale_layer = 28;
   optional bool transform_changed = 40;
   optional float post_local_scale_factor = 29;
-  optional float local_maximum_animation_target_scale = 30;
-  optional float local_starting_animation_scale = 31;
-  optional float combined_maximum_animation_target_scale = 32;
-  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
@@ skipping 149 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];
 }