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

Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp

Index: Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp
diff --git a/Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp b/Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp
index 8c80d55a5cfed861aad3e983923e2002bdb61423..8638c78ae43798a679a4be5baf6866b8fbf959b5 100644
--- a/Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp
+++ b/Tools/DumpRenderTree/TestNetscapePlugIn/Tests/SlowNPPNew.cpp
@@ -35,7 +35,7 @@ public:
         : PluginTest(npp, identifier)
     {
     }
-    
+
 private:
     class PluginObject : public Object<PluginObject> {
     public:
@@ -56,24 +56,24 @@ private:
         {
             static const char* message = "My name is ";
             char* propertyString = pluginTest()->NPN_UTF8FromIdentifier(propertyName);
-            
+
             int bufferLength = strlen(propertyString) + strlen(message) + 1;
             char* resultBuffer = static_cast<char*>(pluginTest()->NPN_MemAlloc(bufferLength));
             snprintf(resultBuffer, bufferLength, "%s%s", message, propertyString);
-            
+
             STRINGZ_TO_NPVARIANT(resultBuffer, *result);
 
             return true;
         }
     };
-    
+
     virtual NPError NPP_GetValue(NPPVariable variable, void *value)
     {
         if (variable != NPPVpluginScriptableNPObject)
             return NPERR_GENERIC_ERROR;
-        
+
         *(NPObject**)value = PluginObject::create(this);
-        
+
         return NPERR_NO_ERROR;
     }