Minimal set of changes for blink core jumbo build.

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

Index: third_party/WebKit/Source/core/paint/BUILD.gn
diff --git a/third_party/WebKit/Source/core/paint/BUILD.gn b/third_party/WebKit/Source/core/paint/BUILD.gn
index 29258112a2019604303aa498fabcb70bb1feca9e..3387e099c6762865298b26f0754172cd026177c0 100644
--- a/third_party/WebKit/Source/core/paint/BUILD.gn
+++ b/third_party/WebKit/Source/core/paint/BUILD.gn
@@ -202,6 +202,11 @@ blink_core_sources("paint") {
     "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",