Motown: Remove LPCM optimizations, fix prepare, add flush, add ActiveMultistreamSink model/stage

services/media/framework/ptr.h

-// Copyright 2016 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 SERVICES_MEDIA_FRAMEWORK_PTR_H_
-#define SERVICES_MEDIA_FRAMEWORK_PTR_H_
-
-#include <memory>
-
-namespace mojo {
-namespace media {
-
-// unique_ptr with Clone.
-// TODO(dalesat): Remove in favor of unique_ptr and a Clone template function.
-template<class T, class Deleter = std::default_delete<T>>
-class UniquePtr : public std::unique_ptr<T, Deleter> {
- public:
-  UniquePtr() : std::unique_ptr<T, Deleter>() {}
-
-  UniquePtr(std::nullptr_t) : std::unique_ptr<T, Deleter>() {}
-
-  explicit UniquePtr(T* ptr) : std::unique_ptr<T, Deleter>(ptr) {}
-
-  UniquePtr(UniquePtr&& other) :
-      std::unique_ptr<T, Deleter>(std::move(other)) {}
-
-  UniquePtr& operator=(std::nullptr_t) {
-    this->reset();
-    return *this;
-  }
-
-  UniquePtr& operator=(UniquePtr&& other) {
-    *static_cast<std::unique_ptr<T, Deleter>*>(this) = std::move(other);
-    return *this;
-  }
-
-  UniquePtr Clone() const { return *this ? this->get()->Clone() : UniquePtr(); }
-};
-
-// shared_ptr with upcast to TBase.
-// TODO(dalesat): Remove in favor of shared_ptr.
-template<class T, typename TBase>
-class SharedPtr : public std::shared_ptr<T> {
- public:
-  SharedPtr() : std::shared_ptr<T>() {}
-
-  SharedPtr(std::nullptr_t) : std::shared_ptr<T>() {}
-
-  explicit SharedPtr(T* ptr) : std::shared_ptr<T>(ptr) {}
-
-  SharedPtr& operator=(std::nullptr_t) {
-    this->reset();
-    return *this;
-  }
-
-  operator std::shared_ptr<TBase>() const {
-    return std::shared_ptr<TBase>(*this, this->get());
-  }
-};
-
-}  // namespace media
-}  // namespace mojo
-
-#endif // SERVICES_MEDIA_FRAMEWORK_PTR_H_