Cleanup WebState and WebStateUserData API

ios/consumer/base/supports_user_data.cc

-// Copyright 2013 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.
-
-#include "ios/public/consumer/base/supports_user_data.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "base/supports_user_data.h"
-
-namespace ios {
-
-// Class that wraps a ios::SupportsUserData::Data object in a
-// base::SupportsUserData::Data object. The wrapper object takes ownership of
-// the wrapped object and will delete it on destruction.
-class DataAdaptor : public base::SupportsUserData::Data {
- public:
-  DataAdaptor(SupportsUserData::Data* data);
-  virtual ~DataAdaptor();
-
-  SupportsUserData::Data* data() { return data_.get(); }
-
- private:
-  scoped_ptr<SupportsUserData::Data> data_;
-};
-
-DataAdaptor::DataAdaptor(SupportsUserData::Data* data)
-    : data_(data) {}
-
-DataAdaptor::~DataAdaptor() {}
-
-// Class that subclasses base::SupportsUserData in order to enable it to
-// support ios::SupportsUserData::Data objects. It accomplishes this by
-// wrapping these objects internally in ios::DataAdaptor objects.
-class SupportsUserDataInternal : public base::SupportsUserData {
- public:
-  // Returns the data that is associated with |key|, or NULL if there is no
-  // such associated data.
-  ios::SupportsUserData::Data* GetIOSUserData(const void* key);
-
-  // Associates |data| with |key|. Takes ownership of |data| and will delete it
-  // on either a call to |RemoveUserData(key)| or otherwise on destruction.
-  void SetIOSUserData(const void* key, ios::SupportsUserData::Data* data);
-
- private:
-  SupportsUserDataInternal() {}
-  virtual ~SupportsUserDataInternal() {}
-
-  friend class ios::SupportsUserData;
-};
-
-ios::SupportsUserData::Data* SupportsUserDataInternal::GetIOSUserData(
-    const void* key) {
-  DataAdaptor* adaptor = static_cast<DataAdaptor*>(
-      base::SupportsUserData::GetUserData(key));
-  if (!adaptor)
-    return NULL;
-  return adaptor->data();
-}
-
-void SupportsUserDataInternal::SetIOSUserData(
-    const void* key, ios::SupportsUserData::Data* data) {
-  base::SupportsUserData::SetUserData(key, new DataAdaptor(data));
-}
-
-// ios::SupportsUserData implementation.
-SupportsUserData::SupportsUserData()
-    : internal_helper_(new SupportsUserDataInternal()) {
-}
-
-SupportsUserData::~SupportsUserData() {
-  delete internal_helper_;
-}
-
-SupportsUserData::Data* SupportsUserData::GetUserData(const void* key) const {
-  return internal_helper_->GetIOSUserData(key);
-}
-
-void SupportsUserData::SetUserData(const void* key, Data* data) {
-  internal_helper_->SetIOSUserData(key, data);
-}
-
-void SupportsUserData::RemoveUserData(const void* key) {
-  internal_helper_->RemoveUserData(key);
-}
-
-void SupportsUserData::DetachUserDataThread() {
-  internal_helper_->DetachUserDataThread();
-}
-
-}  // namespace ios