Chrome app manifest support for action handlers.

extensions/common/manifest_handlers/action_handlers_handler.h

Index: extensions/common/manifest_handlers/action_handlers_handler.h
diff --git a/extensions/common/manifest_handlers/action_handlers_handler.h b/extensions/common/manifest_handlers/action_handlers_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..99e4ed580bc96edd3a70a495265a5200bf08aca9
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+++ b/extensions/common/manifest_handlers/action_handlers_handler.h
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+// Copyright (c) 2017 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 EXTENSIONS_COMMON_MANIFEST_HANDLERS_ACTION_HANDLERS_HANDLER_H_
+#define EXTENSIONS_COMMON_MANIFEST_HANDLERS_ACTION_HANDLERS_HANDLER_H_
+
+#include <set>
+
+#include "base/macros.h"
+#include "extensions/common/api/app_runtime.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/manifest_handler.h"
+
+namespace extensions {
+
+struct ActionHandlersInfo : public Extension::ManifestData {
+  // Helper to retrieve the value of "action_handlers" for the given
+  // |extension|. Returns the empty set if the extension does not have an entry.
+  static std::set<api::app_runtime::ActionType> GetActionHandlers(
+      const Extension* extension);
+
+  ActionHandlersInfo();
+  ~ActionHandlersInfo() override;
+
+  std::set<api::app_runtime::ActionType> action_handlers;
+};
+
+// Parses the "action_handlers" manifest key.
+class ActionHandlersHandler : public ManifestHandler {
+ public:
+  ActionHandlersHandler();
+  ~ActionHandlersHandler() override;
+
+  bool Parse(Extension* extension, base::string16* error) override;
+
+ private:
+  const std::vector<std::string> Keys() const override;
+
+  DISALLOW_COPY_AND_ASSIGN(ActionHandlersHandler);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_MANIFEST_HANDLERS_ACTION_HANDLERS_HANDLER_H_