[inspector_protocol] Support fall through.

third_party/WebKit/Source/modules/storage/InspectorDOMStorageAgent.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 51 matching lines @@
                                   StorageType,
                                   SecurityOrigin*);
 
  private:
   explicit InspectorDOMStorageAgent(Page*);
 
   // InspectorBaseAgent overrides.
   void restore() override;
 
   // protocol::Dispatcher::DOMStorageCommandHandler overrides.
-  void enable(ErrorString*) override;
-  void disable(ErrorString*) override;
-  void getDOMStorageItems(
-      ErrorString*,
+  Response enable() override;
+  Response disable() override;
+  Response getDOMStorageItems(
       std::unique_ptr<protocol::DOMStorage::StorageId> in_storageId,
       std::unique_ptr<protocol::Array<protocol::Array<String>>>* out_entries)
       override;
-  void setDOMStorageItem(
-      ErrorString*,
+  Response setDOMStorageItem(
       std::unique_ptr<protocol::DOMStorage::StorageId> in_storageId,
       const String& in_key,
       const String& in_value) override;
-  void removeDOMStorageItem(
-      ErrorString*,
+  Response removeDOMStorageItem(
       std::unique_ptr<protocol::DOMStorage::StorageId> in_storageId,
       const String& in_key) override;
 
-  StorageArea* findStorageArea(ErrorString*,
-                               std::unique_ptr<protocol::DOMStorage::StorageId>,
-                               LocalFrame*&);
+  Response findStorageArea(std::unique_ptr<protocol::DOMStorage::StorageId>,
+                           LocalFrame*&,
+                           StorageArea*&);
   std::unique_ptr<protocol::DOMStorage::StorageId> storageId(
       SecurityOrigin*,
       bool isLocalStorage);
 
   Member<Page> m_page;
   bool m_isEnabled;
 };
 
 }  // namespace blink
 
 #endif  // !defined(InspectorDOMStorageAgent_h)