Delete blimp/helium and remove references to it from dependent targets

blimp/helium/owned_register.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 BLIMP_HELIUM_OWNED_REGISTER_H_
-#define BLIMP_HELIUM_OWNED_REGISTER_H_
-
-#include <memory>
-
-#include "base/memory/ptr_util.h"
-#include "blimp/helium/blimp_helium_export.h"
-#include "blimp/helium/result.h"
-#include "blimp/helium/revision_generator.h"
-#include "blimp/helium/serializable_struct.h"
-#include "blimp/helium/stream_helpers.h"
-#include "blimp/helium/syncable.h"
-#include "blimp/helium/syncable_common.h"
-#include "blimp/helium/version_vector.h"
-#include "third_party/protobuf/src/google/protobuf/io/coded_stream.h"
-
-namespace blimp {
-namespace helium {
-
-template <class RegisterType>
-struct OwnedRegisterChangeset : public SerializableStruct {
-  OwnedRegisterChangeset() : last_modified(this), value(this) {}
-  ~OwnedRegisterChangeset() override = default;
-
-  Field<Revision> last_modified;
-  Field<RegisterType> value;
-};
-
-// A Syncable that gives write permissions only to the "owner" Peer,
-// while the other Peer only receives and applies updates.
-template <class RegisterType>
-class OwnedRegister : public Syncable<OwnedRegisterChangeset<RegisterType>> {
- public:
-  using ChangesetType = OwnedRegisterChangeset<RegisterType>;
-
-  OwnedRegister(Peer running_as, Peer owner);
-  ~OwnedRegister() = default;
-
-  void Set(const RegisterType& value);
-  const RegisterType& Get() const;
-
-  // Syncable implementation.
-  std::unique_ptr<ChangesetType> CreateChangeset(Revision from) const override;
-  void ApplyChangeset(const ChangesetType& changeset) override;
-  void ReleaseBefore(Revision checkpoint) override;
-  bool ValidateChangeset(const ChangesetType& changeset) const override;
-  Revision GetRevision() const override;
-  void SetLocalUpdateCallback(
-      const base::Closure& local_update_callback) override;
-
- private:
-  base::Closure local_update_callback_;
-  Revision last_modified_ = 0;
-  Bias bias_;
-  RegisterType value_ = {};
-
-  DISALLOW_COPY_AND_ASSIGN(OwnedRegister);
-};
-
-template <class RegisterType>
-OwnedRegister<RegisterType>::OwnedRegister(Peer owner, Peer running_as)
-    : bias_(ComputeBias(owner, running_as)) {}
-
-template <class RegisterType>
-void OwnedRegister<RegisterType>::SetLocalUpdateCallback(
-    const base::Closure& local_update_callback) {
-  local_update_callback_ = local_update_callback;
-}
-
-template <class RegisterType>
-void OwnedRegister<RegisterType>::Set(const RegisterType& value) {
-  DCHECK(bias_ == Bias::LOCAL);
-
-  value_ = value;
-  last_modified_ = GetNextRevision();
-
-  local_update_callback_.Run();
-}
-
-template <class RegisterType>
-const RegisterType& OwnedRegister<RegisterType>::Get() const {
-  return value_;
-}
-
-template <class RegisterType>
-Revision OwnedRegister<RegisterType>::GetRevision() const {
-  if (bias_ == Bias::LOCAL) {
-    return last_modified_;
-  } else {
-    return 0;
-  }
-}
-
-template <class RegisterType>
-std::unique_ptr<typename OwnedRegister<RegisterType>::ChangesetType>
-OwnedRegister<RegisterType>::CreateChangeset(Revision from) const {
-  DCHECK(bias_ == Bias::LOCAL);
-
-  std::unique_ptr<ChangesetType> changeset = base::MakeUnique<ChangesetType>();
-  changeset->last_modified.Set(last_modified_);
-  changeset->value.Set(value_);
-  return changeset;
-}
-
-template <class RegisterType>
-void OwnedRegister<RegisterType>::ApplyChangeset(
-    const ChangesetType& changeset) {
-  if (last_modified_ < changeset.last_modified()) {
-    value_ = changeset.value();
-    last_modified_ = changeset.last_modified();
-  }
-}
-
-template <class RegisterType>
-void OwnedRegister<RegisterType>::ReleaseBefore(Revision checkpoint) {
-  // no-op
-}
-
-template <class RegisterType>
-bool OwnedRegister<RegisterType>::ValidateChangeset(
-    const ChangesetType& changeset) const {
-  if (bias_ == Bias::LOCAL) {
-    return false;
-  }
-
-  if (last_modified_ > changeset.last_modified()) {
-    return false;
-  }
-
-  return true;
-}
-
-}  // namespace helium
-}  // namespace blimp
-
-#endif  // BLIMP_HELIUM_OWNED_REGISTER_H_