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

Source/wtf/TCSpinLock.h

Index: Source/wtf/TCSpinLock.h
diff --git a/Source/wtf/TCSpinLock.h b/Source/wtf/TCSpinLock.h
index ae98ee4fa1f8f5b58bccddde13b8764d99904bc0..2c1cd7c6a29cd1dcf8d3301471beaaa3503b5897 100644
--- a/Source/wtf/TCSpinLock.h
+++ b/Source/wtf/TCSpinLock.h
@@ -1,11 +1,11 @@
 // Copyright (c) 2005, 2006, Google Inc.
 // Copyright (c) 2010, Patrick Gansterer <paroga@paroga.com>
 // All rights reserved.
-// 
+//
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
-// 
+//
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ -15,7 +15,7 @@
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
-// 
+//
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR