Replacing the 'return 0;' statements with 'return nullptr;'

public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 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 125 matching lines @@
 
     virtual bool didLoadingProgress() = 0;
 
     virtual bool hasSingleSecurityOrigin() const = 0;
     virtual bool didPassCORSAccessCheck() const = 0;
 
     virtual double mediaTimeForTimeValue(double timeValue) const = 0;
 
     virtual unsigned decodedFrameCount() const = 0;
     virtual unsigned droppedFrameCount() const = 0;
-    virtual unsigned corruptedFrameCount() const { return 0; };
+    virtual unsigned corruptedFrameCount() const { return 0; }
     virtual unsigned audioDecodedByteCount() const = 0;
     virtual unsigned videoDecodedByteCount() const = 0;
 
     virtual void paint(WebCanvas*, const WebRect&, unsigned char alpha, SkXfermode::Mode) = 0;
     // Do a GPU-GPU textures copy if possible.
     virtual bool copyVideoTextureToPlatformTexture(WebGraphicsContext3D*, unsigned texture, unsigned level, unsigned internalFormat, unsigned type, bool premultiplyAlpha, bool flipY) { return false; }
 
-    virtual WebAudioSourceProvider* audioSourceProvider() { return 0; }
+    virtual WebAudioSourceProvider* audioSourceProvider() { return nullptr; }
 
     // Returns whether keySystem is supported. If true, the result will be
     // reported by an event.
     virtual MediaKeyException generateKeyRequest(const WebString& keySystem, const unsigned char* initData, unsigned initDataLength) { return MediaKeyExceptionKeySystemNotSupported; }
     virtual MediaKeyException addKey(const WebString& keySystem, const unsigned char* key, unsigned keyLength, const unsigned char* initData, unsigned initDataLength, const WebString& sessionId) { return MediaKeyExceptionKeySystemNotSupported; }
     virtual MediaKeyException cancelKeyRequest(const WebString& keySystem, const WebString& sessionId) { return MediaKeyExceptionKeySystemNotSupported; }
     virtual void setContentDecryptionModule(WebContentDecryptionModule* cdm, WebContentDecryptionModuleResult result) { result.completeWithError(WebContentDecryptionModuleExceptionNotSupportedError, 0, "ERROR"); }
 
     // Sets the poster image URL.
     virtual void setPoster(const WebURL& poster) { }
 
     // Instruct WebMediaPlayer to enter/exit fullscreen.
     virtual void enterFullscreen() { }
 
     virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
     // |selectedTrackId| is null if no track is selected.
     virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
 };
 
 } // namespace blink
 
 #endif