[Password Manager] Add UMA stats to track interaction with synced accounts.

components/password_manager/core/common/sync_state.h

Index: components/password_manager/core/common/sync_state.h
diff --git a/components/password_manager/core/common/sync_state.h b/components/password_manager/core/common/sync_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..7c6d8bda4d285c67246fe607032532b043d563f9
--- /dev/null
+++ b/components/password_manager/core/common/sync_state.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_SYNC_STATE_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_SYNC_STATE_H_
+
+namespace password_manager {
+
+// Current state of sync. Used for metrics reporting.
+enum SyncState {
+  NOT_SYNCING,
+  PASSWORD_SYNC_DISABLED,
+  PASSWORD_SYNC_ENABLED,
+  NUM_SYNC_STATES,
+};
+
+}  // namespace password_manager
+
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_SYNC_STATE_H_