Initial clear server data impl

chrome/browser/sync/test/integration/sync_test.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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_TEST_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_TEST_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 352 matching lines @@
   // of test being run and command line args passed in.
   void DecideServerType();
 
   // Initializes any custom services needed for the |profile| at |index|.
   void InitializeProfile(int index, Profile* profile);
 
   // Sets up the client-side invalidations infrastructure depending on the
   // value of |server_type_|.
   void InitializeInvalidations(int index);
 
+  // Clear server data, and restart sync.
+  bool ClearServerData(ProfileSyncServiceHarness* harness);
+
   // Python sync test server, started on demand.
   syncer::LocalSyncTestServer sync_server_;
 
   // Helper class to whitelist the notification port.
   std::unique_ptr<net::ScopedPortException> xmpp_port_;
 
   // Used to differentiate between single-client and two-client tests as well
   // as wher the in-process FakeServer is used.
   TestType test_type_;
 
@@ skipping 75 matching lines @@
   std::unique_ptr<net::URLFetcherImplFactory> factory_;
 
   // The contents to be written to a profile's Preferences file before the
   // Profile object is created. If empty, no preexisting file will be written.
   std::string preexisting_preferences_file_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncTest);
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_TEST_H_