[GCM] Fix crash during connection races

google_apis/gcm/engine/fake_connection_handler.h

 // Copyright 2013 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 GOOGLE_APIS_GCM_ENGINE_FAKE_CONNECTION_HANDLER_H_
 #define GOOGLE_APIS_GCM_ENGINE_FAKE_CONNECTION_HANDLER_H_
 
 #include <list>
 
 #include "google_apis/gcm/base/mcs_message.h"
@@ skipping 33 matching lines @@
   void set_fail_login(bool fail_login) {
     fail_login_ = fail_login;
   }
 
   // Whether to invoke the write callback on the next send attempt or fake a
   // connection error instead.
   void set_fail_send(bool fail_send) {
     fail_send_ = fail_send;
   }
 
+  // Whether a socket-level error was encountered or not.
+  void set_had_error(bool had_error) {
+    had_error_ = had_error;
+  }
+
+  bool initialized() const { return initialized_; }
+
  private:
   ConnectionHandler::ProtoReceivedCallback read_callback_;
   ConnectionHandler::ProtoSentCallback write_callback_;
 
   std::list<MCSMessage> expected_outgoing_messages_;
 
   // Whether to fail the login or not.
   bool fail_login_;
 
   // Whether to fail a SendMessage call or not.
   bool fail_send_;
 
   // Whether a successful login has completed.
   bool initialized_;
 
+  // Whether an error was encountered after a successful login.
+  bool had_error_;
+
   DISALLOW_COPY_AND_ASSIGN(FakeConnectionHandler);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_FAKE_CONNECTION_HANDLER_H_