Remove ImageData::dispose()

third_party/WebKit/Source/platform/heap/Handle.h

 /*
  * Copyright (C) 2014 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1001 matching lines @@
     using Type = RawPtr<T>;
 };
 
 template<typename T>
 class RawPtrOrMemberTrait<T, true> {
     STATIC_ONLY(RawPtrOrMemberTrait)
 public:
     using Type = Member<T>;
 };
 
-// Abstraction for injecting calls to an object's 'dispose()' method
-// on leaving a stack scope, ensuring earlier release of resources
-// than waiting until the object is eventually GCed.
-template<typename T, void (T::*Disposer)() = (&T::dispose)>
-class ScopedDisposal {
-    STACK_ALLOCATED();
-public:
-    ScopedDisposal(T* object)
-        : m_object(object)
-    {
-    }
-
-    ~ScopedDisposal()
-    {
-        if (m_object)
-            (m_object->*Disposer)();
-    }
-
-    void clear() { m_object.clear(); }
-
-private:
-    typename RawPtrOrMemberTrait<T>::Type m_object;

[sof, 2016/04/16 05:25:16]

This was/is the sole use of this trait.

ftr, I don't mind keeping both around; templates with no particular costs
attached and these are (conceivably) general purpose tools for the toolbox.

-};
-
 // SelfKeepAlive<Object> is the idiom to use for objects that have to keep
 // themselves temporarily alive and cannot rely on there being some
 // external reference in that interval:
 //
 //  class Opener {
 //  public:
 //     ...
 //     void open()
 //     {
 //         // Retain a self-reference while in an open()ed state:
@@ skipping 237 matching lines @@
     // into it.
     //
     // TODO(sof): remove this hack once wtf/Functional.h can also work with a type like
     // CrossThreadWeakPersistent<>.
     static WeakPtr<T> unwrap(const StorageType& value) { return WeakPtr<T>(WeakReference<T>::create(value.get())); }
 };
 
 } // namespace WTF
 
 #endif