Add Observatory to sky dart_controller

sky/engine/core/script/dart_service_isolate.h

Index: sky/engine/core/script/dart_service_isolate.h
diff --git a/sky/engine/core/script/dart_service_isolate.h b/sky/engine/core/script/dart_service_isolate.h
new file mode 100644
index 0000000000000000000000000000000000000000..78289b280369bcd83a888016d068f4fe1609abd4
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+++ b/sky/engine/core/script/dart_service_isolate.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef SKY_ENGINE_CORE_SCRIPT_DART_SERVICE_ISOLATE_H_
+#define SKY_ENGINE_CORE_SCRIPT_DART_SERVICE_ISOLATE_H_
+
+#include <string>
+
+#include "include/dart_api.h"
+#include "sky/engine/config.h"
+#include "sky/engine/tonic/dart_builtin.h"
+
+namespace blink {
+
+class DartServiceIsolate {
+ public:
+  static bool Startup(std::string server_ip,
+                      intptr_t server_port,
+                      Dart_LibraryTagHandler embedder_tag_handler,
+                      char** error);
+
+ private:
+  // Native entries.
+  static void TriggerResourceLoad(Dart_NativeArguments args);
+  static void NotifyServerState(Dart_NativeArguments args);
+  static void Shutdown(Dart_NativeArguments args);
+  // Native entry resolution.
+  static Dart_NativeFunction NativeResolver(Dart_Handle name,
+                                            int argument_count,
+                                            bool* auto_setup_scope);
+  static const uint8_t* NativeSymbolizer(Dart_NativeFunction native_function);
+  static DartBuiltin::Natives native_entries_[];
+  static DartBuiltin* builtins_;
+
+  // Script loading.
+  static Dart_Handle GetSource(const char* name);
+  static Dart_Handle LoadScript(const char* name);
+  static Dart_Handle LoadSource(Dart_Handle library, const char* name);
+  static Dart_Handle LibraryTagHandler(Dart_LibraryTag tag, Dart_Handle library,
+                                       Dart_Handle url);
+
+  // Observatory resource loading.
+  static Dart_Handle LoadResources(Dart_Handle library);
+  static Dart_Handle LoadResource(Dart_Handle library, const char* name);
+
+  static Dart_LibraryTagHandler embedder_tag_handler_;
+};
+
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_CORE_SCRIPT_DART_SERVICE_ISOLATE_H_