Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/svg/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("svg") {
   sources = [
     "ColorDistance.cpp",
     "ColorDistance.h",
@@ skipping 39 matching lines @@
     "SVGCursorElement.cpp",
     "SVGCursorElement.h",
     "SVGDefsElement.cpp",
     "SVGDefsElement.h",
     "SVGDescElement.cpp",
     "SVGDescElement.h",
     "SVGDiscardElement.cpp",
     "SVGDiscardElement.h",
     "SVGDocumentExtensions.cpp",
     "SVGElement.cpp",
+    "SVGElement.h",
+    "SVGElementProxy.cpp",
+    "SVGElementProxy.h",
     "SVGElementRareData.cpp",
     "SVGElementRareData.h",
     "SVGEllipseElement.cpp",
     "SVGEllipseElement.h",
     "SVGEnumeration.cpp",
     "SVGFEBlendElement.cpp",
     "SVGFEBlendElement.h",
     "SVGFEColorMatrixElement.cpp",
     "SVGFEColorMatrixElement.h",
     "SVGFEComponentTransferElement.cpp",
@@ skipping 140 matching lines @@
     "SVGPreserveAspectRatio.cpp",
     "SVGPreserveAspectRatioTearOff.cpp",
     "SVGRadialGradientElement.cpp",
     "SVGRadialGradientElement.h",
     "SVGRect.cpp",
     "SVGRect.h",
     "SVGRectElement.cpp",
     "SVGRectElement.h",
     "SVGRectTearOff.cpp",
     "SVGRectTearOff.h",
-    "SVGResourceClient.cpp",
     "SVGResourceClient.h",
     "SVGSVGElement.cpp",
     "SVGSVGElement.h",
     "SVGScriptElement.cpp",
     "SVGScriptElement.h",
     "SVGSetElement.cpp",
     "SVGSetElement.h",
     "SVGStaticStringList.cpp",
     "SVGStaticStringList.h",
     "SVGStopElement.cpp",
@@ skipping 60 matching lines @@
     "graphics/filters/SVGFilterBuilder.h",
     "properties/SVGAnimatedProperty.cpp",
     "properties/SVGPropertyTearOff.cpp",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }