chromeos:: Remove pointless ProxyResolverInterface.

chrome/browser/chromeos/dbus/chrome_proxy_resolver_delegate.cc

-// 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.
-
-#include "chrome/browser/chromeos/dbus/chrome_proxy_resolver_delegate.h"
-
-#include "chrome/browser/profiles/profile_manager.h"
-#include "net/log/net_log_with_source.h"
-#include "net/proxy/proxy_service.h"
-#include "net/url_request/url_request_context_getter.h"
-
-namespace chromeos {
-
-ChromeProxyResolverDelegate::ChromeProxyResolverDelegate() {}
-
-ChromeProxyResolverDelegate::~ChromeProxyResolverDelegate() {}
-
-scoped_refptr<net::URLRequestContextGetter>
-ChromeProxyResolverDelegate::GetRequestContext() {
-  Profile* profile = ProfileManager::GetPrimaryUserProfile();
-  return profile->GetRequestContext();
-}
-
-int ChromeProxyResolverDelegate::ResolveProxy(
-    net::ProxyService* proxy_service,
-    const GURL& url,
-    net::ProxyInfo* results,
-    const net::CompletionCallback& callback) {
-  DCHECK(proxy_service);
-  DCHECK(results);
-  return proxy_service->ResolveProxy(url, std::string(), results, callback,
-                                     nullptr, nullptr, net::NetLogWithSource());
-}
-
-}  // namespace chromeos