Minimal set of changes for blink core jumbo build.

third_party/WebKit/Source/core/paint/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("paint") {
   split_count = 2
   sources = [
     "BackgroundImageGeometry.cpp",
@@ skipping 184 matching lines @@
     "TransformRecorder.cpp",
     "TransformRecorder.h",
     "VideoPainter.cpp",
     "VideoPainter.h",
     "ViewPaintInvalidator.cpp",
     "ViewPaintInvalidator.h",
     "ViewPainter.cpp",
     "ViewPainter.h",
   ]
 
+  jumbo_excluded_sources = [
+    # Collides with BoxBorderPainter (patch incoming)
+    "BoxPainter.cpp",
+  ]
+
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }