[GCM] Check-in with signed in accounts associates device to user

components/gcm_driver/gcm_client.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_GCM_DRIVER_GCM_CLIENT_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 247 matching lines @@
                     const OutgoingMessage& message) = 0;
 
   // Enables or disables internal activity recording.
   virtual void SetRecording(bool recording) = 0;
 
   // Clear all recorded GCM activity logs.
   virtual void ClearActivityLogs() = 0;
 
   // Gets internal states and statistics.
   virtual GCMStatistics GetStatistics() const = 0;
+
+  // Sets a list of accounts with OAuth2 tokens for the next checkin.
+  // |account_tokens| maps email addresses to OAuth2 access tokens.
+  // |account_removed| indicates that an account has been removed since the
+  //     last time the callback was called, which triggers an immediate checkin,
+  //     to ensure that association between device and account is removed.
+  virtual void SetAccountsForCheckin(
+      const std::map<std::string, std::string>& account_tokens,
+      bool account_removed) = 0;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_