chromeos: Update ARC file task code to use action strings.

components/arc/intent_helper/intent_constants.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 COMPONENTS_ARC_INTENT_HELPER_INTENT_CONSTANTS_H_
+#define COMPONENTS_ARC_INTENT_HELPER_INTENT_CONSTANTS_H_
+
+namespace arc {
+
+// Well-known Android intent actions, e.g. "android.intent.action.VIEW"
+// (corresponding to Android's android.content.Intent.ACTION_VIEW constant).
+extern const char kIntentActionView[];
+extern const char kIntentActionSend[];
+extern const char kIntentActionSendMultiple[];
+
+}  // namespace arc
+
+#endif  // COMPONENTS_ARC_INTENT_HELPER_INTENT_CONSTANTS_H_