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

Source/modules/webaudio/AudioBuffer.h

Index: Source/modules/webaudio/AudioBuffer.h
diff --git a/Source/modules/webaudio/AudioBuffer.h b/Source/modules/webaudio/AudioBuffer.h
index 793cfb8fce16cedac848a3f99fbaeb5e26ba583a..fa8cd292c45f0764c53d16f8b74b489f80d31df3 100644
--- a/Source/modules/webaudio/AudioBuffer.h
+++ b/Source/modules/webaudio/AudioBuffer.h
@@ -67,7 +67,7 @@ public:
     // releaseMemory() can be called when the AudioContext goes away, so we can release the memory earlier than when the garbage collection happens.
     // Careful! Only call this when the page unloads, after the AudioContext is no longer processing.
     void releaseMemory();
-    
+
 protected:
     AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
     explicit AudioBuffer(AudioBus*);