Extension activity log database refactoring (step 3)

chrome/browser/extensions/activity_log/activity_action_constants.cc

+// Copyright (c) 2013 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.
+
+// String constants used when logging data in the extension activity log.
+
+#include "chrome/browser/extensions/activity_log/activity_action_constants.h"
+
+namespace activity_log_constants {
+
+// Keys that may be used in the "other" attribute of an Action.
+const char kActionBlockedReason[] = "blocked_reason";
+const char kActionDomVerb[] = "dom_verb";
+const char kActionExtra[] = "extra";
+const char kActionWebRequest[] = "web_request";
+
+}  // namespace activity_log_constants