Initial clear server data impl

components/browser_sync/profile_sync_service.h

Index: components/browser_sync/profile_sync_service.h
diff --git a/components/browser_sync/profile_sync_service.h b/components/browser_sync/profile_sync_service.h
index ee7fa2f9e7d73680d692b5f2188feb659dd10acf..f38aaec96027960a09479d51ba1abd909eff619b 100644
--- a/components/browser_sync/profile_sync_service.h
+++ b/components/browser_sync/profile_sync_service.h
@@ -569,6 +569,10 @@ class ProfileSyncService : public syncer::SyncServiceBase,
   // Triggers sync cycle with request to update specified |types|.
   void RefreshTypesForTest(syncer::ModelTypeSet types);
 
+  // Calls sync engine to send ClearServerDataMessage to server. This is used
+  // to start accounts with a clean slate when performing end to end testing.
+  void ClearServerDataForTest(const base::Closure& callback);
+
  protected:
   // SyncServiceBase implementation.
   syncer::SyncCredentials GetCredentials() override;