Depend on stored sync session GUID for Android.

sync/util/session_utils_android.h

Index: sync/util/session_utils_android.h
diff --git a/sync/util/session_utils_android.h b/sync/util/session_utils_android.h
deleted file mode 100644
index 79058d22d4f9db767f49c3646c706e1bc39c55d5..0000000000000000000000000000000000000000
--- a/sync/util/session_utils_android.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2012 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 SYNC_UTIL_SESSION_UTILS_ANDROID_H_
-#define SYNC_UTIL_SESSION_UTILS_ANDROID_H_
-
-#include <string>
-
-namespace syncer {
-namespace internal {
-
-// Return the unique identifier of this device.
-std::string GetAndroidId();
-
-// Return the end-user-visible name for this device.
-std::string GetModel();
-
-}  // namespace internal
-}  // namespace syncer
-
-#endif  // SYNC_UTIL_SESSION_UTILS_ANDROID_H_