Revert of Tracking filter mutation via SVGElementProxy

third_party/WebKit/Source/core/fetch/BUILD.gn

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("fetch") {
   sources = [
     "AccessControlStatus.h",
     "CSSStyleSheetResource.cpp",
     "CSSStyleSheetResource.h",
     "CachedMetadata.cpp",
     "CachedMetadata.h",
     "CachedMetadataHandler.h",
     "ClientHintsPreferences.cpp",
     "ClientHintsPreferences.h",
     "CrossOriginAccessControl.cpp",
     "CrossOriginAccessControl.h",
     "DocumentResource.cpp",
     "DocumentResource.h",
+    "DocumentResourceReference.h",
     "FetchContext.cpp",
     "FetchContext.h",
     "FetchInitiatorInfo.h",
     "FetchRequest.cpp",
     "FetchRequest.h",
     "FetchUtils.cpp",
     "FetchUtils.h",
     "FontResource.cpp",
     "FontResource.h",
     "ImageResource.cpp",
@@ skipping 26 matching lines @@
     "UniqueIdentifier.h",
     "XSLStyleSheetResource.cpp",
     "XSLStyleSheetResource.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }