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

Source/wtf/AutodrainedPool.h

Index: Source/wtf/AutodrainedPool.h
diff --git a/Source/wtf/AutodrainedPool.h b/Source/wtf/AutodrainedPool.h
index 2f84cfff42c156a40b25f394a67f8d46a3a2e55f..1addbb20d9496390eb90c4054ca7b20fde5b31c1 100644
--- a/Source/wtf/AutodrainedPool.h
+++ b/Source/wtf/AutodrainedPool.h
@@ -6,13 +6,13 @@
  * 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
@@ -42,14 +42,14 @@ public:
 #if OS(DARWIN)
     WTF_EXPORT explicit AutodrainedPool(int iterationLimit = 1);
     WTF_EXPORT ~AutodrainedPool();
-    
+
     WTF_EXPORT void cycle();
 #else
     AutodrainedPool() { }
     ~AutodrainedPool() { }
     void cycle() { }
 #endif
-    
+
 private:
 #if OS(DARWIN)
     int m_iterationLimit;