Apply gn format with 'sources' sorting to src/

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.
 
 import("//testing/test.gni")
 
 defines = [ "GN_BUILD" ]
 
 static_library("gn_lib") {
   sources = [
@@ skipping 37 matching lines @@
     "deps_iterator.cc",
     "deps_iterator.h",
     "err.cc",
     "err.h",
     "escape.cc",
     "escape.h",
     "exec_process.cc",
     "exec_process.h",
     "filesystem_utils.cc",
     "filesystem_utils.h",
-    "functions.cc",
-    "functions.h",
-    "functions_target.cc",
     "function_exec_script.cc",
     "function_foreach.cc",
     "function_get_label_info.cc",
     "function_get_path_info.cc",
     "function_get_target_outputs.cc",
     "function_process_file_template.cc",
     "function_read_file.cc",
     "function_rebase_path.cc",
     "function_set_default_toolchain.cc",
     "function_set_defaults.cc",
     "function_template.cc",
     "function_toolchain.cc",
     "function_write_file.cc",
+    "functions.cc",
+    "functions.h",
+    "functions_target.cc",
     "group_target_generator.cc",
     "group_target_generator.h",
     "header_checker.cc",
     "header_checker.h",
     "import_manager.cc",
     "import_manager.h",
     "input_conversion.cc",
     "input_conversion.h",
     "input_file.cc",
     "input_file.h",
@@ skipping 13 matching lines @@
     "ninja_action_target_writer.cc",
     "ninja_action_target_writer.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",
-    "ninja_utils.cc",
-    "ninja_utils.h",
     "ninja_target_writer.cc",
     "ninja_target_writer.h",
     "ninja_toolchain_writer.cc",
     "ninja_toolchain_writer.h",
+    "ninja_utils.cc",
+    "ninja_utils.h",
     "ninja_writer.cc",
     "ninja_writer.h",
     "operators.cc",
     "operators.h",
     "output_file.cc",
     "output_file.h",
     "parse_tree.cc",
     "parse_tree.h",
     "parser.cc",
     "parser.h",
@@ skipping 33 matching lines @@
     "switches.h",
     "target.cc",
     "target.h",
     "target_generator.cc",
     "target_generator.h",
     "template.cc",
     "template.h",
     "token.cc",
     "token.h",
     "tokenizer.cc",
+    "tokenizer.h",
     "tool.cc",
     "tool.h",
-    "tokenizer.h",
     "toolchain.cc",
     "toolchain.h",
     "trace.cc",
     "trace.h",
     "unique_vector.h",
     "value.cc",
     "value.h",
     "value_extractors.cc",
     "value_extractors.h",
     "variables.cc",
@@ skipping 100 matching lines @@
 }
 
 executable("generate_test_gn_data") {
   sources = [
     "generate_test_gn_data.cc",
   ]
   deps = [
     "//base",
   ]
 }