[Most Visited] Check for Sync state when using SuggestionsService.

components/suggestions/suggestions_utils.cc

+// Copyright 2014 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.
+
+#include "components/suggestions/suggestions_utils.h"
+
+namespace suggestions {
+
+SyncState GetSyncState(bool sync_enabled,
+                       bool sync_initialized,
+                       bool history_sync_enabled) {
+  if (!sync_enabled)
+    return SYNC_OR_HISTORY_SYNC_DISABLED;
+
+  if (!sync_initialized)
+    return NOT_INITIALIZED_ENABLED;
+
+  return history_sync_enabled ?
+      INITIALIZED_ENABLED_HISTORY : SYNC_OR_HISTORY_SYNC_DISABLED;
+}
+
+}  // namespace suggestions