Add ability to clear content licenses

content/browser/plugin_private_storage_helper.h

+// 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_PLUGIN_PRIVATE_STORAGE_HELPER_H_
+#define CONTENT_BROWSER_PLUGIN_PRIVATE_STORAGE_HELPER_H_
+
+#if !defined(ENABLE_PLUGINS)
+#error This file should only be included when plugins are enabled.
+#endif
+
+#include "base/callback_forward.h"
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+#include "url/gurl.h"
+
+namespace storage {
+class FileSystemContext;
+}
+
+namespace content {
+
+// Clear the plugin private filesystem data in |filesystem_context| for
+// |storage_origin| if any file has a last modified time between |begin|
+// and |end|. If |storage_origin| is not specified, then all available
+// origins are checked. |callback| is called when the operation is complete.

[xhwang, 2016/06/02 23:51:45]

s/checked/cleared

[jrummell, 2016/06/08 23:44:08]

All origins are checked for file in the required time period, and cleared if
there is such a file. Substituting cleared would imply that they are always
cleared if |storage_origin| is empty.

+// This must be called on the file task runner.
+void ClearPluginPrivateDataOnFileTaskRunner(
+    scoped_refptr<storage::FileSystemContext> filesystem_context,
+    const GURL& storage_origin,
+    const base::Time begin,
+    const base::Time end,
+    const base::Closure& callback);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_PLUGIN_PRIVATE_STORAGE_HELPER_H_