[Sync] Add cookie jar mismatch logging

sync/test/fake_server/fake_server.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 SYNC_TEST_FAKE_SERVER_FAKE_SERVER_H_
 #define SYNC_TEST_FAKE_SERVER_FAKE_SERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 33 matching lines @@
   // output arguments, |error_code|, |response_code|, and |response|, are used
   // to pass data back to the caller. The command has failed if the value
   // pointed to by |error_code| is nonzero. |completion_closure| will be called
   // immediately before return.
   void HandleCommand(const std::string& request,
                      const base::Closure& completion_closure,
                      int* error_code,
                      int* response_code,
                      std::string* response);
 
+  // Helpers for fetching the last Commit or Getupdates messages, respectively.

[maxbogue, 2016/04/01 22:30:48]

s/Getupdates/GetUpdates

[Nicolas Zea, 2016/04/04 19:57:31]

Done.

+  // Returns true if the specified message existed, and false if no message has
+  // been received.
+  bool GetLastCommitMessage(sync_pb::ClientToServerMessage* message);
+  bool GetLastGetUpdatesMessage(sync_pb::ClientToServerMessage* message);
+
   // Creates a DicionaryValue representation of all entities present in the
   // server. The dictionary keys are the strings generated by ModelTypeToString
   // and the values are ListValues containing StringValue versions of entity
   // names.
   scoped_ptr<base::DictionaryValue> GetEntitiesAsDictionaryValue();
 
   // Returns all entities stored by the server of the given |model_type|.
   // This method returns SyncEntity protocol buffer objects (instead of
   // FakeServerEntity) so that callers can inspect datatype-specific data
   // (e.g., the URL of a session tab).
@@ skipping 175 matching lines @@
   bool alternate_triggered_errors_;
   int request_counter_;
 
   // FakeServer's observers.
   base::ObserverList<Observer, true> observers_;
 
   // When true, the server operates normally. When false, a failure is returned
   // on every request. This is used to simulate a network failure on the client.
   bool network_enabled_;
 
+  // The last received client to server messages.
+  sync_pb::ClientToServerMessage last_commit_message_;
+  sync_pb::ClientToServerMessage last_getupdates_message_;
+
   // Used to verify that FakeServer is only used from one thread.
   base::ThreadChecker thread_checker_;
 
   // Creates WeakPtr versions of the current FakeServer. This must be the last
   // data member!
   base::WeakPtrFactory<FakeServer> weak_ptr_factory_;
 };
 
 }  // namespace fake_server
 
 #endif  // SYNC_TEST_FAKE_SERVER_FAKE_SERVER_H_