[CacheStorage] Add metrics to the scheduler

content/browser/cache_storage/cache_storage_scheduler_client.h

Index: content/browser/cache_storage/cache_storage_scheduler_client.h
diff --git a/content/browser/cache_storage/cache_storage_scheduler_client.h b/content/browser/cache_storage/cache_storage_scheduler_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..67db7e41e4865db1ecb7467554f99dc143b617d5
--- /dev/null
+++ b/content/browser/cache_storage/cache_storage_scheduler_client.h
@@ -0,0 +1,18 @@
+// Copyright 2016 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 CONTENT_BROWSER_CACHE_STORAGE_SCHEDULER_CLIENT_H_
+#define CONTENT_BROWSER_CACHE_STORAGE_SCHEDULER_CLIENT_H_
+
+namespace content {
+
+enum class CacheStorageSchedulerClient {
+  CLIENT_STORAGE = 0,
+  CLIENT_CACHE = 1,
+  CLIENT_BACKGROUND_SYNC = 2
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_CACHE_STORAGE_SCHEDULER_CLIENT_H_