cc: Reland Move data to LayerTree from LayerTreeHost.

cc/proto/layer_tree_host.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_item.proto";
 import "layer.proto";
-import "layer_selection_bound.proto";
 import "layer_tree.proto";
 import "layer_tree_debug_state.proto";
-import "property_tree.proto";
-import "size.proto";
 import "vector2df.proto";
 
 package cc.proto;
 
 option optimize_for = LITE_RUNTIME;
 
 message SkPictureData {
   optional SkPictureID id = 1;
   optional bytes payload = 2; /* SkData */
 }
 
 message SkPictures {
   repeated SkPictureData pictures = 1;
 }
 
 message LayerTreeHost {
   // Not all members of LayerTreeHost are serialized, as they are not helpful
   // for remote usage. See implementation of
   // cc::LayerTreeHost::ToProtobufForCommit for details.
-  optional bool needs_full_tree_sync = 1;
-  optional bool needs_meta_info_recomputation = 2;
   optional int32 source_frame_number = 3;
   optional int32 meta_information_sequence_number = 4;
-  optional LayerNode root_layer = 5;
-  optional LayerUpdate layer_updates = 6;
-  optional int32 hud_layer_id = 7;
   optional LayerTreeDebugState debug_state = 8;
-  optional Size device_viewport_size = 9;
-  optional bool top_controls_shrink_blink_size = 10;
-  optional float top_controls_height = 11;
-  optional float top_controls_shown_ratio = 12;
-  optional float device_scale_factor = 13;
-  optional float painted_device_scale_factor = 14;
-  optional float page_scale_factor = 15;
-  optional float min_page_scale_factor = 16;
-  optional float max_page_scale_factor = 17;
   optional Vector2dF elastic_overscroll = 18;
   optional bool has_gpu_rasterization_trigger = 19;
   optional bool content_is_suitable_for_gpu_rasterization = 20;
-  optional uint32 background_color = 21; /* SkColor */
-  optional bool has_transparent_background = 22;
   optional int32 id = 23;
   optional bool next_commit_forces_redraw = 24;
-  optional int32 overscroll_elasticity_layer_id = 25;
-  optional int32 page_scale_layer_id = 26;
-  optional int32 inner_viewport_scroll_layer_id = 27;
-  optional int32 outer_viewport_scroll_layer_id = 28;
-  optional LayerSelection selection = 29;
-  optional PropertyTrees property_trees = 30;
   optional uint32 surface_client_id = 31;
   optional uint32 next_surface_sequence = 32;
-  optional uint32 wheel_event_listener_properties = 33;
-  optional bool have_scroll_event_handlers = 34;
-  optional uint32 touch_start_or_move_event_listener_properties = 35;
   optional LayerTree layer_tree = 36;
-  optional uint32 touch_end_or_cancel_event_listener_properties = 37;
+  optional LayerUpdate layer_updates = 28;
   optional SkPictures pictures = 38;
 }