Renames WmWindowUserData and converts to using aura

ui/base/class_property.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_CLASS_PROPERTY_H_
 #define UI_BASE_CLASS_PROPERTY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 12 matching lines @@
 //  #include "ui/base/class_property.h"
 //
 //  DECLARE_EXPORTED_UI_CLASS_PROPERTY_TYPE(FOO_EXPORT, MyType);
 //  namespace foo {
 //    // Use this to define an exported property that is primitive,
 //    // or a pointer you don't want automatically deleted.
 //    DEFINE_UI_CLASS_PROPERTY_KEY(MyType, kMyKey, MyDefault);
 //
 //    // Use this to define an exported property whose value is a heap
 //    // allocated object, and has to be owned and freed by the class.
-//    DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(gfx::Rect, kRestoreBoundsKey, NULL);
+//    DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(gfx::Rect, kRestoreBoundsKey, nullptr);
 //
 //    // Use this to define a non exported property that is primitive,
 //    // or a pointer you don't want to automatically deleted, and is used
 //    // only in a specific file. This will define the property in an unnamed
 //    // namespace which cannot be accessed from another file.
 //    DEFINE_LOCAL_UI_CLASS_PROPERTY_KEY(MyType, kMyKey, MyDefault);
 //
 //  }  // foo namespace
 //
 // To define a new type used for ClassProperty.
@@ skipping 179 matching lines @@
   void Deallocator##NAME(int64_t p) {                                    \
     enum { type_must_be_complete = sizeof(TYPE) };                       \
     delete ::ui::ClassPropertyCaster<TYPE*>::FromInt64(p);               \
   }                                                                      \
   const ::ui::ClassProperty<TYPE*> NAME##_Value = {DEFAULT, #NAME,       \
                                                  &Deallocator##NAME};    \
   }                                                                      \
   const ::ui::ClassProperty<TYPE*>* const NAME = &NAME##_Value;
 
 #endif  // UI_BASE_CLASS_PROPERTY_H_