[infra] Translate _sources.gypi files to _sources.gni files

runtime/bin/builtin_impl_sources.gni

Index: runtime/bin/builtin_impl_sources.gni
diff --git a/runtime/bin/builtin_impl_sources.gni b/runtime/bin/builtin_impl_sources.gni
new file mode 100644
index 0000000000000000000000000000000000000000..c7391071c22aa6fb9da6ade2df72ee1dec9fca2f
--- /dev/null
+++ b/runtime/bin/builtin_impl_sources.gni
@@ -0,0 +1,80 @@
+# Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# This file contains all C++ sources for the dart:_builtin library and
+# some of the C++ sources for the dart:io library.  The rest are in
+# io_impl_sources.gypi.
+
+builtin_impl_sources = [
+  "crypto.cc",
+  "crypto.h",
+  "crypto_android.cc",
+  "crypto_fuchsia.cc",
+  "crypto_linux.cc",
+  "crypto_macos.cc",
+  "crypto_win.cc",
+  "builtin_common.cc",
+  "dartutils.cc",
+  "dartutils.h",
+  "directory.cc",
+  "directory.h",
+  "directory_android.cc",
+  "directory_fuchsia.cc",
+  "directory_linux.cc",
+  "directory_macos.cc",
+  "directory_unsupported.cc",
+  "directory_win.cc",
+  "extensions.h",
+  "extensions.cc",
+  "extensions_android.cc",
+  "extensions_fuchsia.cc",
+  "extensions_linux.cc",
+  "extensions_macos.cc",
+  "extensions_win.cc",
+  "fdutils.h",
+  "fdutils_android.cc",
+  "fdutils_fuchsia.cc",
+  "fdutils_linux.cc",
+  "fdutils_macos.cc",
+  "file.cc",
+  "file.h",
+  "file_android.cc",
+  "file_fuchsia.cc",
+  "file_linux.cc",
+  "file_macos.cc",
+  "file_support.cc",
+  "file_unsupported.cc",
+  "file_win.cc",
+  "io_buffer.cc",
+  "io_buffer.h",
+  "isolate_data.cc",
+  "isolate_data.h",
+  "lockers.h",
+  "thread.h",
+  "thread_android.cc",
+  "thread_android.h",
+  "thread_fuchsia.cc",
+  "thread_fuchsia.h",
+  "thread_linux.cc",
+  "thread_linux.h",
+  "thread_macos.cc",
+  "thread_macos.h",
+  "thread_win.cc",
+  "thread_win.h",
+  "utils.h",
+  "utils_android.cc",
+  "utils_fuchsia.cc",
+  "utils_linux.cc",
+  "utils_macos.cc",
+  "utils_win.cc",
+  "utils_win.h",
+]
+
+builtin_impl_tests = [
+  "crypto_test.cc",
+  "directory_test.cc",
+  "eventhandler_test.cc",
+  "file_test.cc",
+  "hashmap_test.cc",
+]