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

Source/bindings/v8/custom/V8HTMLMediaElementCustom.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 25 matching lines @@
     MediaController* controller = 0;
     if (!value->IsNull()) {
         if (!V8MediaController::HasInstance(value, info.GetIsolate(), worldType(info.GetIsolate()))) {
             throwTypeError("Value is not of type MediaController", info.GetIsolate());
             return;
         }
         controller = V8MediaController::toNative(value->ToObject());
     }
 
     // 4.8.10.11.2 Media controllers: controller attribute.
-    // On setting, it must first remove the element's mediagroup attribute, if any, 
+    // On setting, it must first remove the element's mediagroup attribute, if any,
     HTMLMediaElement* imp = V8HTMLMediaElement::toNative(info.Holder());
     imp->setMediaGroup(String());
     // and then set the current media controller to the given value.
     imp->setController(controller);
 }
 
 }