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

Source/core/html/track/WebVTTParser.h

Index: Source/core/html/track/WebVTTParser.h
diff --git a/Source/core/html/track/WebVTTParser.h b/Source/core/html/track/WebVTTParser.h
index 8839af7646d13abf0c4ee368d8abc4188f672f31..7d4f08f7ad8e0db854752ce922a8c6a139abc93e 100644
--- a/Source/core/html/track/WebVTTParser.h
+++ b/Source/core/html/track/WebVTTParser.h
@@ -76,7 +76,7 @@ public:
     {
         return adoptPtr(new WebVTTParser(client, context));
     }
-    
+
     static inline bool isRecognizedTag(const AtomicString& tagName)
     {
         return tagName == iTag
@@ -93,7 +93,7 @@ public:
     }
     static inline bool isValidSettingDelimiter(char c)
     {
-        // ... a WebVTT cue consists of zero or more of the following components, in any order, separated from each other by one or more 
+        // ... a WebVTT cue consists of zero or more of the following components, in any order, separated from each other by one or more
         // U+0020 SPACE characters or U+0009 CHARACTER TABULATION (tab) characters.
         return c == ' ' || c == '\t';
     }
@@ -154,7 +154,7 @@ private:
     double m_currentEndTime;
     StringBuilder m_currentContent;
     String m_currentSettings;
-    
+
     WebVTTToken m_token;
     OwnPtr<WebVTTTokenizer> m_tokenizer;