Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/html/track/WebVTTTokenizer.cpp

Index: Source/core/html/track/WebVTTTokenizer.cpp
diff --git a/Source/core/html/track/WebVTTTokenizer.cpp b/Source/core/html/track/WebVTTTokenizer.cpp
index f00dfc82fe88cc2e1e6fd5140523d2e1a0789260..b2c30e78d740fb21fd657d5bb5f78c73fe976d8a 100644
--- a/Source/core/html/track/WebVTTTokenizer.cpp
+++ b/Source/core/html/track/WebVTTTokenizer.cpp
@@ -63,7 +63,7 @@ void WebVTTTokenizer::reset()
     m_token = 0;
     m_buffer.clear();
 }
-    
+
 bool WebVTTTokenizer::nextToken(SegmentedString& source, WebVTTToken& token)
 {
     // If we have a token in progress, then we're supposed to be called back
@@ -189,7 +189,7 @@ bool WebVTTTokenizer::nextToken(SegmentedString& source, WebVTTToken& token)
         WEBVTT_ADVANCE_TO(StartTagAnnotationState);
     }
     END_STATE()
-    
+
     WEBVTT_BEGIN_STATE(EndTagOpenState) {
         if (cc == '>' || cc == kEndOfFileMarker) {
             m_token->beginEndTag('\0');