Build dart:zircon and dart:zircon_ffi

Author: iskakaushik

shell/platform/fuchsia/BUILD.gn

@@ -77,6 +77,7 @@ group("fuchsia") {
   deps = [
     ":dart_binaries",
     ":flutter_binaries",
+    "dart-pkg",
     "dart_runner:dart_aot_${product_suffix}runner",
     "dart_runner:dart_jit_${product_suffix}runner",
     "flutter:flutter_aot_${product_suffix}runner",

shell/platform/fuchsia/dart-pkg/BUILD.gn

@@ -0,0 +1,9 @@
+# Copyright 2013 The Flutter 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-pkg") {
+  deps = [
+    "zircon:dart_zircon"
+  ]
+}

shell/platform/fuchsia/dart-pkg/zircon/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/fuchsia/sdk.gni")
+import("//flutter/tools/fuchsia/dart/dart_library.gni")
 
 config("zircon_config") {
   include_dirs = [ "." ]
@@ -35,3 +36,18 @@ source_set("zircon") {
     "//flutter/third_party/tonic",
   ]
 }
+
+dart_library("dart_zircon") {
+  package_name = "zircon"
+
+  sources = [
+    "src/handle.dart",
+    "src/handle_disposition.dart",
+    "src/handle_waiter.dart",
+    "src/init.dart",
+    "src/system.dart",
+    "zircon.dart",
+  ]
+
+  deps = [ "../zircon_ffi:dart_zircon_ffi" ]
+}

shell/platform/fuchsia/dart-pkg/zircon_ffi/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/fuchsia/sdk.gni")
+import("//flutter/tools/fuchsia/dart/dart_library.gni")
 
 config("zircon_ffi_config") {
   include_dirs = [ "." ]
@@ -21,3 +22,9 @@ shared_library("zircon_ffi") {
     "//third_party/dart/runtime:dart_api",
   ]
 }
+
+dart_library("dart_zircon_ffi") {
+  package_name = "zircon_ffi"
+
+  sources = [ "zircon_ffi.dart" ]
+}