text: /*
   * Copyright (C) 2020 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_ADDRESS_SPACE_FEATURE_H_
  #define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_ADDRESS_SPACE_FEATURE_H_
  
  #include "base/optional.h"
  #include "services/network/public/mojom/ip_address_space.mojom-blink.h"
  #include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
  #include "third_party/blink/renderer/core/core_export.h"
  
  namespace blink {
  
  class LocalFrame;
  class ResourceResponse;
  
  // Describes a type of fetch for the purposes of categorizing feature use.
  enum class FetchType {
    // A document fetching a subresource (image, script, etc.).
    kSubresource,
  
    // A navigation from one document to the next.
    kNavigation,
  };
  
  // Returns the kAddressSpace* WebFeature enum value corresponding to a client
  // in |client_address_space| fetching data from |response_address_space|, if
  // any.
  //
  // |fetch_type| describes the fetch itself.
  //
  // |client_is_secure_context| specifies whether the client execution context is
  // a secure context, as defined in
  // https://html.spec.whatwg.org/multipage/webappapis.html#secure-context.
  //
  // Returns nullopt if the load is not a private network request, as defined in
  // https://wicg.github.io/cors-rfc1918/#private-network-request.
  base::Optional<mojom::blink::WebFeature> CORE_EXPORT AddressSpaceFeature(
      FetchType fetch_type,
      network::mojom::blink::IPAddressSpace client_address_space,
      bool client_is_secure_context,
      network::mojom::blink::IPAddressSpace resource_address_space);
  
  // Increments the correct kAddressSpace* WebFeature UseCounter corresponding to
  // the given |client_frame| performing a fetch of type |fetch_type| and
  // receiving the given |response|.
  //
  // Does nothing if |client_frame| is nullptr.
  void RecordAddressSpaceFeature(FetchType fetch_type,
                                 LocalFrame* client_frame,
                                 const ResourceResponse& response);
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_ADDRESS_SPACE_FEATURE_H_
  