Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/shared_lib/DartNativeExtensions.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMFEATURES_H_
-#define SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMFEATURES_H_
+#ifndef DartNativeExtensions_h
+#define DartNativeExtensions_h
 
-#include "sky/engine/platform/PlatformExport.h"
+#include "wtf/text/WTFString.h"
+#include <dart_api.h>
+
 
 namespace blink {
 
-class FontPlatformFeatures {
+class DartNativeExtensions {
 public:
-    static bool canExpandAroundIdeographsInComplexText();
+    static Dart_Handle loadExtension(const String& url, Dart_Handle parentLibrary);
 
 private:
-    FontPlatformFeatures();
+    static Dart_Handle loadExtensionLibrary(const String& libraryPath, const String& libraryName, void** libraryHandle);
+    static Dart_Handle resolveSymbol(void* libHandle, const String& symbolName, void** symbol);
 };
 
-} // namespace blink
+}
 
-#endif  // SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMFEATURES_H_
+#endif // DartNativeExtensions_h