GN threading refactor

tools/gn/BUILD.gn

 # Copyright (c) 2013 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.
 
 gyp_file = "gn.gyp"
 
 # Not defined when doing a pure GYP build, this lets the code key off of
 # GN-specific features (the last change target).
 defines = [ "GN_BUILD" ]
 
 static_library("gn_lib") {
   sources = [
     "args.cc",
     "args.h",
     "binary_target_generator.cc",
     "binary_target_generator.h",
     "build_settings.cc",
     "build_settings.h",
+    "builder.cc",
+    "builder.h",
+    "builder_record.cc",
+    "builder_record.h",
     "command_args.cc",
     "command_desc.cc",
     "command_gen.cc",
     "command_gyp.cc",
     "command_help.cc",
     "command_refs.cc",
     "commands.cc",
     "commands.h",
     "config.cc",
     "config.h",
@@ skipping 36 matching lines @@
     "import_manager.cc",
     "import_manager.h",
     "input_conversion.cc",
     "input_conversion.h",
     "input_file.cc",
     "input_file.h",
     "input_file_manager.cc",
     "input_file_manager.h",
     "item.cc",
     "item.h",
-    "item_node.cc",
-    "item_node.h",
-    "item_tree.cc",
-    "item_tree.h",
     "label.cc",
     "label.h",
     "label_ptr.h",
+    "loader.cc",
+    "loader.h",
     "location.cc",
     "location.h",
     "ninja_binary_target_writer.cc",
     "ninja_binary_target_writer.h",
     "ninja_build_writer.cc",
     "ninja_build_writer.h",
     "ninja_copy_target_writer.cc",
     "ninja_copy_target_writer.h",
     "ninja_group_target_writer.cc",
     "ninja_group_target_writer.h",
@@ skipping 37 matching lines @@
     "source_file.cc",
     "source_file.h",
     "standard_out.cc",
     "standard_out.h",
     "string_utils.cc",
     "string_utils.h",
     "target.cc",
     "target.h",
     "target_generator.cc",
     "target_generator.h",
-    "target_manager.cc",
-    "target_manager.h",
     "token.cc",
     "token.h",
     "tokenizer.cc",
     "tokenizer.h",
     "toolchain.cc",
     "toolchain.h",
-    "toolchain_manager.cc",
-    "toolchain_manager.h",
     "trace.cc",
     "trace.h",
     "value.cc",
     "value.h",
     "value_extractors.cc",
     "value_extractors.h",
     "variables.cc",
     "variables.h",
   ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
-    "//build/util:last_change",
   ]
 }
 
 executable("gn") {
   sources = [
     "gn_main.cc",
   ]
 
   deps = [
     ":gn_lib",
+    "//build/util:last_change",
   ]
 }
 
 test("gn_unittests") {
   sources = [
+    "builder_unittest.cc",
     "escape_unittest.cc",
     "file_template_unittest.cc",
     "filesystem_utils_unittest.cc",
     "function_rebase_path_unittest.cc",
     "input_conversion_unittest.cc",
     "label_unittest.cc",
+    "loader_unittest.cc",
     "ninja_binary_target_writer_unittest.cc",
     "ninja_copy_target_writer_unittest.cc",
     "ninja_helper_unittest.cc",
     "ninja_script_target_writer_unittest.cc",
     "parser_unittest.cc",
     "path_output_unittest.cc",
     "pattern_unittest.cc",
     "scope_per_file_provider_unittest.cc",
     "source_dir_unittest.cc",
     "string_utils_unittest.cc",
     "target_generator_unittest.cc",
-    "target_manager_unittest.cc",
     "target_unittest.cc",
     "test_with_scope.cc",
     "test_with_scope.h",
     "tokenizer_unittest.cc",
   ]
   deps = [
     ":gn_lib",
     "//base:run_all_unittests",
     "//base:test_support_base",
     "//testing:gtest",
   ]
 }
 
 executable("generate_test_gn_data") {
   sources = [ "generate_test_gn_data.cc" ]
   deps = [ "//base" ]
 }