Revert of Revert of Adding CopresenceState

components/copresence/tokens.h

Index: components/copresence/tokens.h
diff --git a/components/copresence/tokens.h b/components/copresence/tokens.h
new file mode 100644
index 0000000000000000000000000000000000000000..c28322ebd8c32fe90897c021b1e26d1ca6a5162f
--- /dev/null
+++ b/components/copresence/tokens.h
@@ -0,0 +1,58 @@
+// 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_TOKENS_H_
+#define COMPONENTS_COPRESENCE_TOKENS_H_
+
+#include <string>
+
+#include "base/time/time.h"
+#include "components/copresence/proto/enums.pb.h"
+
+namespace copresence {
+
+struct AudioToken final {
+  AudioToken(const std::string& token, bool audible)
+      : token(token),
+        audible(audible) {}
+
+  std::string token;
+  bool audible;
+};
+
+// It's an error to define these constructors inline,
+// so they're defined in tokens.cc.
+
+struct TransmittedToken final {
+  TransmittedToken();
+
+  std::string id;
+  TokenMedium medium;
+  base::Time start_time;
+  base::Time stop_time;
+  bool broadcast_confirmed;
+};
+
+struct ReceivedToken final {
+  enum Validity {
+    UNKNOWN = 0,
+    VALID = 1,
+    INVALID = 2
+  };
+
+  ReceivedToken();
+  ReceivedToken(const std::string& id,
+                TokenMedium medium,
+                base::Time last_time);
+
+  std::string id;
+  TokenMedium medium;
+  base::Time start_time;
+  base::Time last_time;
+  Validity valid;
+};
+
+}  // namespace copresence
+
+#endif  // COMPONENTS_COPRESENCE_TOKENS_H_