[Sync] Update SyncBackendHost to forward ClearServerData to SyncManager

chrome/browser/sync/glue/sync_backend_host_core.cc

Index: chrome/browser/sync/glue/sync_backend_host_core.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_core.cc b/chrome/browser/sync/glue/sync_backend_host_core.cc
index c0b962cec436be26d1efced2df2e0c3313c2cdb9..01688be44b988211eb6e4bc4637ea211ffdad5e9 100644
--- a/chrome/browser/sync/glue/sync_backend_host_core.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_core.cc
@@ -743,4 +743,21 @@ void SyncBackendHostCore::SaveChanges() {
   sync_manager_->SaveChanges();
 }
 
+void SyncBackendHostCore::DoClearServerData(
+    const syncer::SyncManager::ClearServerDataCallback& frontend_callback) {
+  DCHECK_EQ(base::MessageLoop::current(), sync_loop_);
+  const syncer::SyncManager::ClearServerDataCallback callback =
+      base::Bind(&SyncBackendHostCore::ClearServerDataDone,
+                 weak_ptr_factory_.GetWeakPtr(), frontend_callback);
+  sync_manager_->ClearServerData(callback);
+}
+
+void SyncBackendHostCore::ClearServerDataDone(
+    const base::Closure& frontend_callback) {
+  DCHECK_EQ(base::MessageLoop::current(), sync_loop_);
+  host_.Call(FROM_HERE, &SyncBackendHostImpl::ClearServerDataDoneOnFrontendLoop,
+             frontend_callback);
+}
+
+
 }  // namespace browser_sync