[Sync] Update SyncBackendHost to forward ClearServerData to SyncManager

chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc

Index: chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc b/chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc
index b864cbce3e176d44cb91768eb4792c2b19065859..e01c28fa60aa701f7d8e1d5a580c7863c3cea16d 100644
--- a/chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc
@@ -42,6 +42,7 @@
 #include "sync/internal_api/public/util/experiments.h"
 #include "sync/protocol/encryption.pb.h"
 #include "sync/protocol/sync_protocol_error.h"
+#include "sync/test/callback_counter.h"
 #include "sync/util/test_unrecoverable_error_handler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -797,6 +798,17 @@ TEST_F(SyncBackendHostTest, DisableThenPurgeType) {
       error_types).Empty());
 }
 
+// Test that a call to ClearServerData is forwarded to the underlying
+// SyncManager.
+TEST_F(SyncBackendHostTest, ClearServerDataCallsAreForwarded) {
+  InitializeBackend(true);
+  syncer::CallbackCounter callback_counter;
+  backend_->ClearServerData(base::Bind(&syncer::CallbackCounter::Callback,
+                                       base::Unretained(&callback_counter)));
+  fake_manager_->WaitForSyncThread();
+  EXPECT_EQ(1, callback_counter.times_called());
+}
+
 }  // namespace
 
 }  // namespace browser_sync