Initial work on Dart bindings for Mojo.

mojo/public/dart/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.
+
+group("dart") {
+  deps = [
+    ":system",
+    ":bindings",
+  ]
+}
+
+group("system") {
+  deps = [
+    ":mojo_dart_system",
+    ":copy_system",
+  ]
+}
+
+shared_library("mojo_dart_system") {
+  dart_flags = "//mojo/dart/tools/find_api_include_path.py"
+  include_dirs = exec_script(dart_flags, [], "list lines")
+  defines = ["DART_SHARED_LIB"]
+  sources = [
+    "system/lib/src/mojo_dart_system.cc",
+  ]
+  deps = [
+    "//mojo/public/c/environment",
+    "//mojo/public/c/system:for_shared_library",
+    "//mojo/public/cpp/environment:standalone",
+    "//mojo/public/cpp/system",
+    "//mojo/public/cpp/utility",
+    "//mojo/public/cpp/bindings:callback",
+  ]
+}
+
+copy("copy_system") {
+  sources = [
+    "$root_out_dir/libmojo_dart_system.so",
+  ]
+  outputs = [
+    "$root_out_dir/gen/mojo/public/dart/system/lib/src/libmojo_dart_system.so"
+  ]
+  deps =[
+    ":mojo_dart_system"
+  ]
+}
+
+copy("bindings") {
+  sources = [
+    "bindings/lib/bindings.dart",
+    "bindings/lib/src/interface.dart",
+    "bindings/lib/src/client.dart",
+    "bindings/lib/src/codec.dart",
+    "bindings/test/codec_test.dart",
+    "system/lib/embedder.dart",
+    "system/lib/src/handle.dart",
+    "system/lib/src/types.dart",
+    "system/lib/src/buffer.dart",
+    "system/lib/src/handle_watcher.dart",
+    "system/lib/src/data_pipe.dart",
+    "system/lib/src/message_pipe.dart",
+    "system/lib/core.dart",
+    "system/tests/event_handler_test.dart",
+    "system/tests/core_test.dart",
+    "tests/echo_test.dart",
+    "tests/bindings_generation_test.dart",
+    "utils/lib/expect.dart",
+  ]
+  outputs = [
+    "{{source_gen_dir}}/{{source_file_part}}"
+  ]
+}