Remove resource type-specific fetching logic from ResourceFetcher

Source/core/fetch/LinkFetchResource.cpp

+// Copyright 2015 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 "config.h"
+#include "core/fetch/LinkFetchResource.h"
+
+#include "core/fetch/FetchRequest.h"
+#include "core/fetch/ResourceFetcher.h"
+
+namespace blink {
+
+ResourcePtr<Resource> LinkFetchResource::fetch(Resource::Type type, FetchRequest& request, ResourceFetcher* fetcher)
+{
+    // TODO(yoav): Enforce a LinkPreload context here, once we know we're adding one - https://github.com/whatwg/fetch/issues/36
+    ASSERT(type == LinkPrefetch || type == LinkSubresource || type == LinkPreload);
+    ASSERT(request.resourceRequest().frameType() == WebURLRequest::FrameTypeNone);
+    fetcher->determineRequestContext(request.mutableResourceRequest(), type);
+    return fetcher->requestResource(request, LinkResourceFactory(type));
+}
+
+LinkFetchResource::LinkFetchResource(const ResourceRequest& request, Type type)
+    : Resource(request, type)
+{
+}
+
+LinkFetchResource::~LinkFetchResource()
+{
+}
+
+}