Initial clear server data impl

chrome/browser/sync/test/integration/sync_test.h

Index: chrome/browser/sync/test/integration/sync_test.h
diff --git a/chrome/browser/sync/test/integration/sync_test.h b/chrome/browser/sync/test/integration/sync_test.h
index 818fecd361f33e05cae599675906f49fcea027fd..d23d1310a9844c89f5e8831a71f9b31a6662e9b0 100644
--- a/chrome/browser/sync/test/integration/sync_test.h
+++ b/chrome/browser/sync/test/integration/sync_test.h
@@ -174,6 +174,9 @@ class SyncTest : public InProcessBrowserTest {
   // Initializes sync clients and profiles if required and syncs each of them.
   virtual bool SetupSync() WARN_UNUSED_RESULT;
 
+  // Initialize, and clear data for given client.
+  bool SetupAndClearClient(size_t index);
+
   // Sets whether or not the sync clients in this test should respond to
   // notifications of their own commits.  Real sync clients do not do this, but
   // many test assertions require this behavior.
@@ -370,6 +373,9 @@ class SyncTest : public InProcessBrowserTest {
   // 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_;