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

Source/core/editing/ReplaceNodeWithSpanCommand.h

Index: Source/core/editing/ReplaceNodeWithSpanCommand.h
diff --git a/Source/core/editing/ReplaceNodeWithSpanCommand.h b/Source/core/editing/ReplaceNodeWithSpanCommand.h
index 247b8dea8edd02337fe371aaac42864c4938a86e..4282b2c8c885138e92429d1f34f09bbb0f139163 100644
--- a/Source/core/editing/ReplaceNodeWithSpanCommand.h
+++ b/Source/core/editing/ReplaceNodeWithSpanCommand.h
@@ -1,10 +1,10 @@
 /*
  * Copyright (c) 2009 Google Inc. 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
@@ -14,7 +14,7 @@
  *     * 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
@@ -52,7 +52,7 @@ private:
 
     virtual void doApply() OVERRIDE;
     virtual void doUnapply() OVERRIDE;
-    
+
 #ifndef NDEBUG
     virtual void getNodesInCommand(HashSet<Node*>&) OVERRIDE;
 #endif