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

Tools/DumpRenderTree/TestNetscapePlugIn/Tests/PluginScriptableNPObjectInvokeDefault.cpp

 /*
  * Copyright (C) 2010 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 20 matching lines @@
 class PluginScriptableNPObjectInvokeDefault : public PluginTest {
 public:
     PluginScriptableNPObjectInvokeDefault(NPP npp, const string& identifier)
         : PluginTest(npp, identifier)
     {
     }
 
 private:
     struct NPObjectWithoutInvokeDefault : Object<NPObjectWithoutInvokeDefault> { };
 
-    struct NPObjectWithInvokeDefault : Object<NPObjectWithInvokeDefault> { 
+    struct NPObjectWithInvokeDefault : Object<NPObjectWithInvokeDefault> {
     public:
         bool invokeDefault(const NPVariant*, uint32_t, NPVariant* result)
         {
             INT32_TO_NPVARIANT(1, *result);
             return true;
         }
     };
 
     virtual NPError NPP_GetValue(NPPVariable variable, void *value)
     {
         if (variable != NPPVpluginScriptableNPObject)
             return NPERR_GENERIC_ERROR;
 
         NPObject* object;
         if (identifier() == "plugin-scriptable-npobject-invoke-default")
             object = NPObjectWithInvokeDefault::create(this);
         else
             object = NPObjectWithoutInvokeDefault::create(this);
-        
+
         *(NPObject**)value = object;
-        
+
         return NPERR_NO_ERROR;
     }
 };
 
 static PluginTest::Register<PluginScriptableNPObjectInvokeDefault> pluginScriptableNPObjectInvokeDefault("plugin-scriptable-npobject-invoke-default");
 static PluginTest::Register<PluginScriptableNPObjectInvokeDefault> pluginScriptableNPObjectNoInvokeDefault("plugin-scriptable-npobject-no-invoke-default");