Add Observatory to sky dart_controller

sky/engine/bindings/BUILD.gn

 # Copyright 2015 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("//sky/engine/bindings/bindings.gni")
 import("//sky/engine/core/core.gni")
 
 source_set("bindings") {
   sources = [
     "builtin.cc",
@@ skipping 12 matching lines @@
     "exception_state.cc",
     "exception_state.h",
     "exception_state_placeholder.cc",
     "exception_state_placeholder.h",
     "mojo_natives.cc",
     "mojo_natives.h",
     "nullable.h",
     "scheduled_action.cc",
     "scheduled_action.h",
   ]
+
+  defines = [ "DART_IO_SECURE_SOCKET_DISABLED" ]
+
   deps = [
     "//base",
     "//dart/runtime/bin:libdart_withcore",
     "//mojo/public/c/system",
     "//mojo/public/cpp/system",
     "//sky/engine/platform:platform",
     "//sky/engine/tonic",
     "//sky/engine/wtf",
+    "//dart/runtime/bin:embedded_dart_io",
     ":generated_bindings",
     ":snapshot_cc",
   ]
   include_dirs = [
     "..",
     "$root_build_dir",
+    rebase_path("//dart/runtime"),
   ]
 }
 
 action("generate_snapshot_bin") {
   deps = [
     "//dart/runtime/bin:gen_snapshot($host_toolchain)",
     ":generate_dart_sky",
   ]
   inputs = [
     "//dart/runtime/tools/create_snapshot_bin.py",
@@ skipping 324 matching lines @@
   ]
 
   include_dirs = [
     "..",
     "$root_build_dir",
   ]
 
   sources = get_target_outputs(":compile_idls")
   sources += get_target_outputs(":generate_dart_globals")
 }