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

Source/wtf/text/AtomicString.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 225 matching lines @@
     }
 };
 
 PassRefPtr<StringImpl> AtomicString::add(const UChar* s, unsigned length)
 {
     if (!s)
         return 0;
 
     if (!length)
         return StringImpl::empty();
-    
+
     UCharBuffer buffer = { s, length };
     return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
 }
 
 PassRefPtr<StringImpl> AtomicString::add(const UChar* s, unsigned length, unsigned existingHash)
 {
     ASSERT(s);
     ASSERT(existingHash);
 
     if (!length)
@@ skipping 59 matching lines @@
     unsigned maxLength = baseString->length() - start;
     if (length >= maxLength) {
         if (!start)
             return add(baseString);
         length = maxLength;
     }
 
     SubstringLocation buffer = { baseString, start, length };
     return addToStringTable<SubstringLocation, SubstringTranslator>(buffer);
 }
-    
+
 typedef HashTranslatorCharBuffer<LChar> LCharBuffer;
 struct LCharBufferTranslator {
     static unsigned hash(const LCharBuffer& buf)
     {
         return StringHasher::computeHashAndMaskTop8Bits(buf.s, buf.length);
     }
 
     static bool equal(StringImpl* const& str, const LCharBuffer& buf)
     {
         return WTF::equal(str, buf.s, buf.length);
@@ skipping 123 matching lines @@
 }
 
 #ifndef NDEBUG
 void AtomicString::show() const
 {
     m_string.show();
 }
 #endif
 
 } // namespace WTF