Fix headers to account for the split of dart_api.h

Source/bindings/dart/DartHandleProxy.h

 /*
  * Copyright (C) 2012 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 14 matching lines @@
  * 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 DartHandleProxy_h
 #define DartHandleProxy_h
 
 #include <dart_api.h>
+#include <dart_mirrors_api.h>
 #include <v8.h>
 
 namespace WebCore {
 
 class DartHandleProxy {
 public:
     static v8::Handle<v8::Value> create(Dart_Handle value);
     static v8::Handle<v8::Value> createForLibrary(intptr_t libraryId);
     static void getMirrorAPI(v8::Handle<v8::Object> container);
 };
 
 }
 
 #endif // DartHandleProxy_h