OOR-CORS: remove unused network::cors::legacy

CORS support code for non network service code path existed
in the network::cors::legacy namespace, and mistakenly is left
even after the network service full launch.

This patch removes the network::cors::legacy,
//services/network/public/cpp/cors/cors_legacy.{cc|h}.

Bug: 1053866
Change-Id: Id03f49751d63dbe8fc1cac48161aa9c579d3ebe8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552322
Auto-Submit: Takashi Toyoshima <toyoshim@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829637}

services/network/public/cpp/cors/cors_legacy.cc

-// Copyright 2018 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 "services/network/public/cpp/cors/cors_legacy.h"
-
-#include <algorithm>
-
-#include "url/gurl.h"
-#include "url/url_util.h"
-
-namespace {
-
-std::vector<std::string>* secure_origins = nullptr;
-
-}  // namespace
-
-namespace network {
-
-namespace cors {
-
-namespace legacy {
-
-void RegisterSecureOrigins(const std::vector<std::string>& origins) {
-  delete secure_origins;
-  secure_origins = new std::vector<std::string>(origins.size());
-  std::copy(origins.begin(), origins.end(), secure_origins->begin());
-}
-
-const std::vector<std::string>& GetSecureOrigins() {
-  if (!secure_origins)
-    secure_origins = new std::vector<std::string>;
-  return *secure_origins;
-}
-
-}  // namespace legacy
-
-}  // namespace cors
-
-}  // namespace network

services/network/public/cpp/cors/cors_legacy.h

-// Copyright 2018 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 SERVICES_NETWORK_PUBLIC_CPP_CORS_CORS_LEGACY_H_
-#define SERVICES_NETWORK_PUBLIC_CPP_CORS_CORS_LEGACY_H_
-
-#include <string>
-#include <vector>
-
-#include "base/component_export.h"
-
-namespace network {
-namespace cors {
-
-// Functions in namespace legacy are for legacy code path. Pure Network
-// Service code should not use it. Since files in public/cpp/cors are shared
-// between Network Service and legacy code path in content, but Network Service
-// should not know content dependent concepts, we need to provide abstracted
-// interfaces to implement extra checks for the case code runs in content.
-//
-// TODO(toyoshim): Remove all functions after Network Service is enabled.
-namespace legacy {
-
-// Registers allowlisted secure origins and hostname patterns for CORS checks in
-// CorsURLLoader.
-COMPONENT_EXPORT(NETWORK_CPP)
-void RegisterSecureOrigins(const std::vector<std::string>& secure_origins);
-
-// Refers the registered allowlisted secure origins and hostname patterns.
-COMPONENT_EXPORT(NETWORK_CPP)
-const std::vector<std::string>& GetSecureOrigins();
-
-}  // namespace legacy
-
-}  // namespace cors
-}  // namespace network
-
-#endif  // SERVICES_NETWORK_PUBLIC_CPP_CORS_CORS_LEGACY_H_