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

Source/modules/webaudio/AudioParam.cpp

Index: Source/modules/webaudio/AudioParam.cpp
diff --git a/Source/modules/webaudio/AudioParam.cpp b/Source/modules/webaudio/AudioParam.cpp
index 52013f7d91dc8f92c3d788f8c3be290a8ace010c..6555e8e4f17a7e03c1c8785a5b64d13b81b9f44b 100644
--- a/Source/modules/webaudio/AudioParam.cpp
+++ b/Source/modules/webaudio/AudioParam.cpp
@@ -74,12 +74,12 @@ bool AudioParam::smooth()
     bool useTimelineValue = false;
     if (context())
         m_value = m_timeline.valueForContextTime(context(), narrowPrecisionToFloat(m_value), useTimelineValue);
-    
+
     if (m_smoothedValue == m_value) {
         // Smoothed value has already approached and snapped to value.
         return true;
     }
-    
+
     if (useTimelineValue)
         m_smoothedValue = m_value;
     else {