cc: Merge LayerTree into the LayerTreeHost.

cc/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//cc/cc.gni")
 
 cc_component("cc") {
   sources = [
     "debug/benchmark_instrumentation.cc",
@@ skipping 432 matching lines @@
     "trees/damage_tracker.cc",
     "trees/damage_tracker.h",
     "trees/draw_property_utils.cc",
     "trees/draw_property_utils.h",
     "trees/effect_node.cc",
     "trees/effect_node.h",
     "trees/element_id.cc",
     "trees/element_id.h",
     "trees/latency_info_swap_promise_monitor.cc",
     "trees/latency_info_swap_promise_monitor.h",
-    "trees/layer_tree.cc",
-    "trees/layer_tree.h",
     "trees/layer_tree_host.cc",
     "trees/layer_tree_host.h",
     "trees/layer_tree_host_client.h",
     "trees/layer_tree_host_common.cc",
     "trees/layer_tree_host_common.h",
     "trees/layer_tree_host_impl.cc",
     "trees/layer_tree_host_impl.h",
     "trees/layer_tree_host_single_thread_client.h",
     "trees/layer_tree_impl.cc",
     "trees/layer_tree_impl.h",
@@ skipping 523 matching lines @@
   data = [
     "test/data/",
 
     # Needed for isolate script to execute.
     "//testing/scripts/common.py",
     "//testing/xvfb.py",
     "//testing/scripts/run_gtest_perf_test.py",
     "//tools/perf/generate_legacy_perf_dashboard_json.py",
   ]
 }