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diff --git a/Source/WebCore/Modules/fetch/FetchRequest.h b/Source/WebCore/Modules/fetch/FetchRequest.h
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+++ b/Source/WebCore/Modules/fetch/FetchRequest.h
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+/*
+ * Copyright (C) 2016 Canon Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted, provided that the following conditions
+ * are required to be met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  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.
+ * 3.  Neither the name of Canon 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 CANON INC. AND ITS 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 CANON INC. AND ITS 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.
+ */
+
+#pragma once
+
+#if ENABLE(FETCH_API)
+
+#include "ExceptionOr.h"
+#include "FetchBodyOwner.h"
+#include "FetchOptions.h"
+#include "ResourceRequest.h"
+#include <wtf/Optional.h>
+
+namespace WebCore {
+
+class Blob;
+class ScriptExecutionContext;
+class URLSearchParams;
+
+class FetchRequest final : public FetchBodyOwner {
+public:
+    static Ref<FetchRequest> create(ScriptExecutionContext& context) { return adoptRef(*new FetchRequest(context, std::nullopt, FetchHeaders::create(FetchHeaders::Guard::Request), { })); }
+
+    using Cache = FetchOptions::Cache;
+    using Credentials = FetchOptions::Credentials;
+    using Destination = FetchOptions::Destination;
+    using Mode = FetchOptions::Mode;
+    using Redirect = FetchOptions::Redirect;
+    using ReferrerPolicy = FetchOptions::ReferrerPolicy;
+    using Type = FetchOptions::Type;
+
+    struct Init {
+        String method;
+        String referrer;
+        std::optional<ReferrerPolicy> referrerPolicy;
+        std::optional<Mode> mode;
+        std::optional<Credentials> credentials;
+        std::optional<Cache> cache;
+        std::optional<Redirect> redirect;
+        String integrity;
+        JSC::JSValue window;
+    };
+
+    ExceptionOr<FetchHeaders&> initializeWith(FetchRequest&, const Init&);
+    ExceptionOr<FetchHeaders&> initializeWith(const String&, const Init&);
+    ExceptionOr<void> setBody(JSC::ExecState&, JSC::JSValue, FetchRequest*);
+
+    const String& method() const { return m_internalRequest.request.httpMethod(); }
+    const String& url() const;
+    FetchHeaders& headers() { return m_headers.get(); }
+
+    Type type() const;
+    Destination destination() const;
+    String referrer() const;
+    ReferrerPolicy referrerPolicy() const;
+    Mode mode() const;
+    Credentials credentials() const;
+    Cache cache() const;
+    Redirect redirect() const;
+
+    const String& integrity() const { return m_internalRequest.integrity; }
+
+    ExceptionOr<Ref<FetchRequest>> clone(ScriptExecutionContext&);
+
+    struct InternalRequest {
+        ResourceRequest request;
+        FetchOptions options;
+        String referrer;
+        String integrity;
+    };
+
+    const FetchOptions& fetchOptions() const { return m_internalRequest.options; }
+    ResourceRequest internalRequest() const;
+    bool isBodyReadableStream() const { return !isBodyNull() && body().isReadableStream(); }
+
+    const String& internalRequestReferrer() const { return m_internalRequest.referrer; }
+
+private:
+    FetchRequest(ScriptExecutionContext&, std::optional<FetchBody>&&, Ref<FetchHeaders>&&, InternalRequest&&);
+
+    ExceptionOr<FetchHeaders&> initializeOptions(const Init&);
+
+    const char* activeDOMObjectName() const final;
+    bool canSuspendForDocumentSuspension() const final;
+
+    InternalRequest m_internalRequest;
+    mutable String m_requestURL;
+};
+
+inline FetchRequest::FetchRequest(ScriptExecutionContext& context, std::optional<FetchBody>&& body, Ref<FetchHeaders>&& headers, InternalRequest&& internalRequest)
+    : FetchBodyOwner(context, WTFMove(body), WTFMove(headers))
+    , m_internalRequest(WTFMove(internalRequest))
+{
+}
+
+inline auto FetchRequest::cache() const -> Cache
+{
+    return m_internalRequest.options.cache;
+}
+
+inline auto FetchRequest::credentials() const -> Credentials
+{
+    return m_internalRequest.options.credentials;
+}
+
+inline auto FetchRequest::destination() const -> Destination
+{
+    return m_internalRequest.options.destination;
+}
+
+inline auto FetchRequest::mode() const -> Mode
+{
+    return m_internalRequest.options.mode;
+}
+
+inline auto FetchRequest::redirect() const -> Redirect
+{
+    return m_internalRequest.options.redirect;
+}
+
+inline auto FetchRequest::referrerPolicy() const -> ReferrerPolicy
+{
+    return m_internalRequest.options.referrerPolicy;
+}
+
+inline auto FetchRequest::type() const -> Type
+{
+    return m_internalRequest.options.type;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(FETCH_API)