Revert of Adding CopresenceState

components/copresence/public/copresence_state.h

-// Copyright 2014 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 COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_
-#define COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-namespace copresence {
-
-class CopresenceObserver;
-class Directive;
-struct TransmittedToken;
-struct ReceivedToken;
-
-// This class tracks the state of the copresence component and can notify
-// interested parties when it changes. This is useful for debugging purposes.
-class CopresenceState {
- public:
-  // Add a listener for future state changes. |observer| is owned by the caller,
-  // and must be valid until removed (or the CopresenceState is destroyed).
-  virtual void AddObserver(CopresenceObserver* observer) = 0;
-
-  // Remove a state change listener.
-  virtual void RemoveObserver(CopresenceObserver* observer) = 0;
-
-  // Accessor for the currently active directives.
-  virtual const std::vector<Directive>& active_directives() const = 0;
-
-  // Accessor for recently transmitted tokens.
-  virtual const std::map<std::string, TransmittedToken>&
-  transmitted_tokens() const = 0;
-
-  // Accessor for recently received tokens.
-  virtual const std::map<std::string, ReceivedToken>&
-  received_tokens() const = 0;
-
- protected:
-  virtual ~CopresenceState() {}
-};
-
-}  // namespace copresence
-
-#endif  // COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_