[DevTools] Clear local storage

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. 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.
@@ skipping 76 matching lines @@
   if (!m_isEnabled)
     return Response::OK();
   m_isEnabled = false;
   m_state->setBoolean(DOMStorageAgentState::domStorageAgentEnabled, false);
   if (StorageNamespaceController* controller =
           StorageNamespaceController::from(m_page))
     controller->setInspectorAgent(nullptr);
   return Response::OK();
 }
 
+Response InspectorDOMStorageAgent::clear(
+    std::unique_ptr<protocol::DOMStorage::StorageId> storageId) {
+  LocalFrame* frame = nullptr;
+  StorageArea* storageArea = nullptr;
+  Response response = findStorageArea(std::move(storageId), frame, storageArea);
+  if (!response.isSuccess())
+    return response;
+  DummyExceptionStateForTesting exceptionState;
+  storageArea->clear(exceptionState, frame);
+  if (exceptionState.hadException())
+    return Response::Error("Could not clear the storage");
+  return Response::OK();
+}
+
 Response InspectorDOMStorageAgent::getDOMStorageItems(
     std::unique_ptr<protocol::DOMStorage::StorageId> storageId,
     std::unique_ptr<protocol::Array<protocol::Array<String>>>* items) {
   LocalFrame* frame = nullptr;
   StorageArea* storageArea = nullptr;
   Response response = findStorageArea(std::move(storageId), frame, storageArea);
   if (!response.isSuccess())
     return response;
 
   std::unique_ptr<protocol::Array<protocol::Array<String>>> storageItems =
@@ skipping 103 matching lines @@
   StorageNamespace* sessionStorage =
       StorageNamespaceController::from(m_page)->sessionStorage();
   if (!sessionStorage)
     return Response::Error("SessionStorage is not supported");
   storageArea =
       sessionStorage->storageArea(frame->document()->getSecurityOrigin());
   return Response::OK();
 }
 
 }  // namespace blink