Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/speech/SpeechSynthesisVoice.h

Index: Source/modules/speech/SpeechSynthesisVoice.h
diff --git a/Source/modules/speech/SpeechSynthesisVoice.h b/Source/modules/speech/SpeechSynthesisVoice.h
index 1664c1dc4ebb7998c146be9c90ccabd7b0ae8fd9..6d83d740222d13c585fed0dd01cd2b83f1e56355 100644
--- a/Source/modules/speech/SpeechSynthesisVoice.h
+++ b/Source/modules/speech/SpeechSynthesisVoice.h
@@ -38,18 +38,18 @@ class SpeechSynthesisVoice : public ScriptWrappable, public RefCounted<SpeechSyn
 public:
     virtual ~SpeechSynthesisVoice() { }
     static PassRefPtr<SpeechSynthesisVoice> create(PassRefPtr<PlatformSpeechSynthesisVoice>);
-    
+
     const String& voiceURI() const { return m_platformVoice->voiceURI(); }
     const String& name() const { return m_platformVoice->name(); }
     const String& lang() const { return m_platformVoice->lang(); }
     bool localService() const { return m_platformVoice->localService(); }
     bool isDefault() const { return m_platformVoice->isDefault(); }
-    
+
     PlatformSpeechSynthesisVoice* platformVoice() const { return m_platformVoice.get(); }
 
 private:
     explicit SpeechSynthesisVoice(PassRefPtr<PlatformSpeechSynthesisVoice>);
-    
+
     RefPtr<PlatformSpeechSynthesisVoice> m_platformVoice;
 };