Cleanup v8 usage in bindings

Source/bindings/v8/ExceptionStatePlaceholder.h

 /*
  * Copyright (C) 2013 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 16 matching lines @@
  * (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 ExceptionStatePlaceholder_h
 #define ExceptionStatePlaceholder_h
 
 #include "bindings/v8/ExceptionState.h"
 #include "wtf/Assertions.h"
 #include "wtf/text/WTFString.h"
+#include <v8.h>
 
 namespace WebCore {
 
 class ExceptionState;
 
 typedef int ExceptionCode;
 
 class IgnorableExceptionState FINAL : public ExceptionState {
 public:
     IgnorableExceptionState(): ExceptionState(ExceptionState::UnknownContext, 0, 0, v8::Handle<v8::Object>(), 0) { }
@@ skipping 24 matching lines @@
     int m_line;
 };
 
 #define ASSERT_NO_EXCEPTION (::WebCore::NoExceptionStateAssertionChecker(__FILE__, __LINE__).returnThis())
 
 #endif
 
 } // namespace WebCore
 
 #endif // ExceptionStatePlaceholder_h