Move JS support code from //mojo/edk/js to //services/js/system

services/js/system/handle.h

 // 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.
 
-#ifndef MOJO_EDK_JS_HANDLE_H_
-#define MOJO_EDK_JS_HANDLE_H_
+#ifndef SERVICES_JS_SYSTEM_HANDLE_H_
+#define SERVICES_JS_SYSTEM_HANDLE_H_
 
 #include "base/observer_list.h"
 #include "gin/converter.h"
 #include "gin/handle.h"
 #include "gin/wrappable.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 namespace js {
 class HandleCloseObserver;
@@ skipping 71 matching lines @@
     if (!Converter<mojo::js::HandleWrapper*>::FromV8(isolate, val, &object)) {
       return false;
     }
     *out = gin::Handle<mojo::js::HandleWrapper>(val, object);
     return true;
   }
 };
 
 }  // namespace gin
 
-#endif  // MOJO_EDK_JS_HANDLE_H_
+#endif  // SERVICES_JS_SYSTEM_HANDLE_H_