Add src/gin to the GN build.

gin/BUILD.gn

Index: gin/BUILD.gn
diff --git a/gin/BUILD.gn b/gin/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..99fd1bdc14cf9c929ca2552cd6f3ef86819f24b0
--- /dev/null
+++ b/gin/BUILD.gn
@@ -0,0 +1,130 @@
+# 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.
+
+component("gin") {
+  sources = [
+    "arguments.cc",
+    "arguments.h",
+    "array_buffer.cc",
+    "array_buffer.h",
+    "context_holder.cc",
+    "converter.cc",
+    "converter.h",
+    "dictionary.cc",
+    "dictionary.h",
+    "function_template.cc",
+    "function_template.h",
+    "gin_export.h",
+    "handle.h",
+    "interceptor.cc",
+    "interceptor.h",
+    "isolate_holder.cc",
+    "modules/console.cc",
+    "modules/console.h",
+    "modules/file_module_provider.cc",
+    "modules/file_module_provider.h",
+    "modules/module_registry.cc",
+    "modules/module_registry.h",
+    "modules/module_registry_observer.h",
+    "modules/module_runner_delegate.cc",
+    "modules/module_runner_delegate.h",
+    "modules/timer.cc",
+    "modules/timer.h",
+    "object_template_builder.cc",
+    "object_template_builder.h",
+    "per_context_data.cc",
+    "per_context_data.h",
+    "per_isolate_data.cc",
+    "per_isolate_data.h",
+    "public/context_holder.h",
+    "public/gin_embedders.h",
+    "public/isolate_holder.h",
+    "public/v8_platform.h",
+    "public/wrapper_info.h",
+    "runner.cc",
+    "runner.h",
+    "shell_runner.cc",
+    "shell_runner.h",
+    "try_catch.cc",
+    "try_catch.h",
+    "v8_platform.cc",
+    "wrappable.cc",
+    "wrappable.h",
+    "wrapper_info.cc",
+  ]
+
+  defines = [ "GIN_IMPLEMENTATION" ]
+  deps = [
+    "//base",
+    "//base/third_party/dynamic_annotations",
+    #TODO(GYP)
+    #"//v8",
+  ]
+
+  forward_dependent_configs_from = [
+    "//base",
+    #TODO(GYP)
+    #"//v8",
+  ]
+}
+
+# TODO(GYP) needs v8
+if (false) {
+  executable("gin_shell") {
+    sources = [
+      "shell/gin_main.cc",
+    ]
+
+    deps = [
+      ":gin",
+      "//base",
+      "//base:i18n",
+      "//v8",
+    ]
+  }
+
+  source_set("gin_test") {
+    sources = [
+      "test/file_runner.cc",
+      "test/file_runner.h",
+      "test/gc.cc",
+      "test/gc.h",
+      "test/gtest.cc",
+      "test/gtest.h",
+      "test/v8_test.cc",
+      "test/v8_test.h",
+    ]
+
+    deps = [
+      ":gin",
+      "//testing/gtest",
+      "//v8",
+    ]
+
+    forward_dependent_configs_from = [
+      ":gin",
+      "//testing/gtest",
+    ]
+  }
+
+  test("gin_unittests") {
+    sources = [
+      "converter_unittest.cc",
+      "interceptor_unittest.cc",
+      "modules/module_registry_unittest.cc",
+      "modules/timer_unittest.cc",
+      "per_context_data_unittest.cc",
+      "shell_runner_unittest.cc",
+      "test/run_all_unittests.cc",
+      "test/run_js_tests.cc",
+      "wrappable_unittest.cc",
+    ]
+
+    deps = [
+      ":gin_test",
+      "//base/test:run_all_unittests",
+      "//v8",
+    ]
+  }
+}