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

Tools/DumpRenderTree/TestNetscapePlugIn/Tests/GetURLWithJavaScriptURLDestroyingPlugin.cpp

 /*
  * Copyright (C) 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    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
@@ skipping 24 matching lines @@
         : PluginTest(npp, identifier)
     {
     }
 
 private:
 
     virtual NPError NPP_New(NPMIMEType pluginType, uint16_t mode, int16_t argc, char *argn[], char *argv[], NPSavedData *saved)
     {
         NPN_GetURL("javascript:removePlugin()", 0);
         return NPERR_NO_ERROR;
-    }        
+    }
 };
 
 static PluginTest::Register<GetURLWithJavaScriptURLDestroyingPlugin> getURLWithJavaScriptURLDestroyingPlugin("get-url-with-javascript-url-destroying-plugin");