chromeos:: Remove pointless ProxyResolverInterface.

chrome/browser/chromeos/dbus/chrome_proxy_resolver_delegate.h

-// Copyright 2014 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_CHROMEOS_DBUS_CHROME_PROXY_RESOLVER_DELEGATE_H_
-#define CHROME_BROWSER_CHROMEOS_DBUS_CHROME_PROXY_RESOLVER_DELEGATE_H_
-
-#include "base/macros.h"
-#include "chromeos/dbus/services/proxy_resolution_service_provider.h"
-
-namespace chromeos {
-
-// Chrome's implementation of ProxyResolverDelegate.
-class ChromeProxyResolverDelegate : public ProxyResolverDelegate {
- public:
-  ChromeProxyResolverDelegate();
-  ~ChromeProxyResolverDelegate() override;
-
-  // ProxyResolverDelegate override.
-  scoped_refptr<net::URLRequestContextGetter> GetRequestContext() override;
-  int ResolveProxy(net::ProxyService* proxy_service,
-                   const GURL& url,
-                   net::ProxyInfo* results,
-                   const net::CompletionCallback& callback) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ChromeProxyResolverDelegate);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_DBUS_CHROME_PROXY_RESOLVER_DELEGATE_H_