cc: Move tracking of layer_property_changed to main thread (3)

cc/proto/layer.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 "display_list_recording_source.proto";
 import "layer_position_constraint.proto";
 import "point3f.proto";
 import "pointf.proto";
@@ skipping 51 matching lines @@
   // The Layer base class and each descendant have different proto messages
   // for their specific properties.
   optional BaseLayerProperties base = 5;
 
   // Only one of these fields may be set per LayerProperties.
   // TODO(dtrainor): use a 'oneof' union when it's supported in Chromium.  See
   // crbug.com/570371.
   optional PictureLayerProperties picture = 6;
 }
 
-// NEXT ID: 54
+// NEXT ID: 53
 message BaseLayerProperties {
   optional Point3F transform_origin = 1;
   optional uint32 background_color = 2;
   optional Size bounds = 3;
   optional int64 transform_free_index = 4;
   optional int64 effect_tree_index = 5;
   optional int64 clip_tree_index = 6;
   optional int64 scroll_tree_index = 50;
   optional Vector2dF offset_to_transform_parent = 7;
   optional bool double_sided = 8;
   optional bool draws_content = 9;
   optional bool hide_layer_and_subtree = 10;
   optional bool has_render_surface = 11;
-  optional bool subtree_property_changed = 53;
+  optional bool subtree_property_changed = 47;
   // TODO(nyquist): Add support for FilterOperation. See crbug.com/541321.
   // repeated FilterOperation filters = 12;
   // repeated FilterOperation background_filters = 13;
   optional bool masks_to_bounds = 14;
   optional uint32 main_thread_scrolling_reasons = 15;
   optional bool have_scroll_event_handlers = 17;
   optional Region non_fast_scrollable_region = 18;
   optional Region touch_event_handler_region = 19;
   optional bool contents_opaque = 21;
   optional float opacity = 22;
@@ skipping 21 matching lines @@
   optional int32 scroll_parent_id = 40;
   repeated int32 scroll_children_ids = 41;
 
   optional int32 clip_parent_id = 42;
   repeated int32 clip_children_ids = 43;
 
   optional ScrollOffset scroll_offset = 44;
   optional Vector2dF scroll_compensation_adjustment = 45;
 
   optional Rect update_rect = 46;
-  optional bool stacking_order_changed = 47;
 
   // TODO(nyquist): Figure out what to do with LayerAnimationController.
   // optional LayerAnimationController layer_animation_controller = 48;
 
   // TODO(nyquist): Figure out what to do with FrameTimingRequests.
   // repeated FrameTimingRequest frame_timing_requests = 49;
 }
 
 message PictureLayerProperties {
   optional DisplayListRecordingSource recording_source = 1;
   optional Region invalidation = 2;
   optional Rect last_updated_visible_layer_rect = 3;
   optional bool is_mask = 4;
   optional bool nearest_neighbor = 5;
 
   optional int64 update_source_frame_number = 6;
 }