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

Source/wtf/ThreadSpecific.h

Index: Source/wtf/ThreadSpecific.h
diff --git a/Source/wtf/ThreadSpecific.h b/Source/wtf/ThreadSpecific.h
index fb2749a82091a36b6a44ed3e48d7a9600274d3ba..516d6f7f46b7f9103e458a7edff7ea0a1dcc4b4d 100644
--- a/Source/wtf/ThreadSpecific.h
+++ b/Source/wtf/ThreadSpecific.h
@@ -8,13 +8,13 @@
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer. 
+ *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution. 
+ *     documentation and/or other materials provided with the distribution.
  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission. 
+ *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED