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

Source/core/loader/SubframeLoader.h

Index: Source/core/loader/SubframeLoader.h
diff --git a/Source/core/loader/SubframeLoader.h b/Source/core/loader/SubframeLoader.h
index 56aae81f9ab142d17bf9a69957bca7cca2f84f55..5f1ae0ccbb243dc6cdf4b0ac39c2eda273f4bf7f 100644
--- a/Source/core/loader/SubframeLoader.h
+++ b/Source/core/loader/SubframeLoader.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
@@ -66,7 +66,7 @@ public:
     bool allowPlugins(ReasonForCallingAllowPlugins);
 
     bool containsPlugins() const { return m_containsPlugins; }
-    
+
     bool resourceWillUsePlugin(const String& url, const String& mimeType, bool shouldPreferPlugInsForImages);
 
 private: