Include wtf/RefCounted.h less often in modules/

Source/modules/webaudio/PeriodicWave.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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 14 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 PeriodicWave_h
 #define PeriodicWave_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "platform/audio/AudioArray.h"
 #include "wtf/Float32Array.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassRefPtr.h"
+#include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class PeriodicWave : public RefCountedWillBeGarbageCollectedFinalized<PeriodicWave>, public ScriptWrappable {
 public:
     static PassRefPtrWillBeRawPtr<PeriodicWave> createSine(float sampleRate);
     static PassRefPtrWillBeRawPtr<PeriodicWave> createSquare(float sampleRate);
     static PassRefPtrWillBeRawPtr<PeriodicWave> createSawtooth(float sampleRate);
     static PassRefPtrWillBeRawPtr<PeriodicWave> createTriangle(float sampleRate);
@@ skipping 39 matching lines @@
     unsigned numberOfPartialsForRange(unsigned rangeIndex) const;
 
     // Creates tables based on numberOfComponents Fourier coefficients.
     void createBandLimitedTables(const float* real, const float* imag, unsigned numberOfComponents);
     Vector<OwnPtr<AudioFloatArray> > m_bandLimitedTables;
 };
 
 } // namespace WebCore
 
 #endif // PeriodicWave_h