Move DnsApiTest.DnsResolveIPLiteral and DnsApiTest.DnsResolveHostname to app_shell_browsertests.

chrome/browser/extensions/api/dns/mock_host_resolver_creator.h

-// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_DNS_MOCK_HOST_RESOLVER_CREATOR_H_
-#define CHROME_BROWSER_EXTENSIONS_API_DNS_MOCK_HOST_RESOLVER_CREATOR_H_
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/synchronization/waitable_event.h"
-
-namespace net {
-class MockHostResolver;
-}
-
-namespace extensions {
-
-// Used only for testing. Creates a MockHostResolver, respecting threading
-// constraints.
-class MockHostResolverCreator
-    : public base::RefCountedThreadSafe<MockHostResolverCreator> {
- public:
-  static const std::string kHostname;
-  static const std::string kAddress;
-
-  MockHostResolverCreator();
-
-  net::MockHostResolver* CreateMockHostResolver();
-  void DeleteMockHostResolver();
-
- private:
-  friend class base::RefCountedThreadSafe<MockHostResolverCreator>;
-  virtual ~MockHostResolverCreator();
-
-  void CreateMockHostResolverOnIOThread();
-  void DeleteMockHostResolverOnIOThread();
-
-  base::WaitableEvent resolver_event_;
-
-  // The MockHostResolver asserts that it's used on the same thread on which
-  // it's created, which is actually a stronger rule than its real counterpart.
-  // But that's fine; it's good practice.
-  //
-  // Plain pointer because we have to manage lifetime manually.
-  net::MockHostResolver* mock_host_resolver_;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DNS_MOCK_HOST_RESOLVER_CREATOR_H_