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")
 
+io_impl_sources_gypi =
+    exec_script("../../../dart/tools/gypi_to_gn.py",
+                [ rebase_path("//dart/runtime/bin/io_impl_sources.gypi") ],
+                "scope",
+                [ "//dart/runtime/bin/io_impl_sources.gypi" ])
+
+builtin_impl_sources_gypi =
+    exec_script("../../../dart/tools/gypi_to_gn.py",
+                [ rebase_path("//dart/runtime/bin/builtin_impl_sources.gypi") ],
+                "scope",
+                [ "//dart/runtime/bin/builtin_impl_sources.gypi" ])
+
+# A source set for the implementation of 'dart:io' library
+# (without secure sockets).
+source_set("dart_io_no_secure_socket_bindings") {
+  # Set custom sources assignment filter. The custom filters does three things:
+  # 1) Filters out unnecessary files pulled in from the gypi files.
+  # 2) Filters out secure socket support.
+  # 3) Enables dart:io by filtering out _unsupported.cc implementations.
+  custom_sources_filter = sources_assignment_filter + [
+                            "*net/nss_memio.cc",
+                            "*net/nss_memio.h",
+                            "*secure_socket.cc",
+                            "*secure_socket.h",
+                            "*filter_unsupported.cc",
+                            "*io_service_unsupported.cc",
+                            "*_test.cc",
+                            "*_test.h",
+                            "*crypto*",
+                            "*dbg*",
+                            "*extensions*",
+                            "*builtin*",
+                          ]
+  if (!is_mac) {
+    # Dart tree uses *_macos.* instead of *_mac.*
+    custom_sources_filter += [
+      "*_macos.h",
+      "*_macos.cc",
+    ]
+  }
+  defines = [ "DART_IO_SECURE_SOCKET_DISABLED" ]
+  if (!is_debug) {
+    defines += [ "NDEBUG" ]
+  } else {
+    defines += [ "DEBUG" ]
+  }
+  set_sources_assignment_filter(custom_sources_filter)
+  sources =
+      rebase_path(io_impl_sources_gypi.sources, "", "//dart/runtime/bin") +
+      rebase_path(builtin_impl_sources_gypi.sources, "", "//dart/runtime/bin") +
+      [
+        "//dart/runtime/bin/log_android.cc",
+        "//dart/runtime/bin/log_linux.cc",
+        "//dart/runtime/bin/log_macos.cc",
+        "//dart/runtime/bin/log_win.cc",
+        "//dart/runtime/bin/log.h",
+        "//dart/runtime/bin/io_natives.cc",
+        "//dart/runtime/bin/io_natives.h",
+      ]
+
+  include_dirs = [
+    rebase_path("//dart/runtime"),
+    rebase_path("//third_party"),
+  ]
+
+  # Restore sources assignment filter.
+  set_sources_assignment_filter(sources_assignment_filter)
+}
+
 source_set("bindings") {
   sources = [
     "builtin.cc",
     "builtin.h",
     "builtin_natives.cc",
     "builtin_natives.h",
     "builtin_sky.cc",
     "builtin_sky.h",
     "custom/dart_element_custom.cc",
     "dart_callback.cc",
     "dart_callback.h",
     "dart_event_listener.cc",
     "dart_event_listener.h",
     "exception_messages.cc",
     "exception_messages.h",
     "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_io_no_secure_socket_bindings",
     ":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")
 }