Remove SK_IGNORE_QUAD_RR_CORNERS_OPT from Chromium builds.

skia/BUILD.gn

 # Copyright (c) 2013 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 
@@ skipping 154 matching lines @@
     "SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=0",
 
     # Forcing the unoptimized path for the offset image filter in skia until
     # all filters used in Blink support the optimized path properly
     "SK_DISABLE_OFFSETIMAGEFILTER_OPTIMIZATION",
 
     "IGNORE_ROT_AA_RECT_OPT",
 
     "SK_IGNORE_BLURRED_RRECT_OPT",
 
-    "SK_IGNORE_QUAD_RR_CORNERS_OPT",
-
     # this flag forces Skia not to use typographic metrics with GDI.
     "SK_GDI_ALWAYS_USE_TEXTMETRICS_FOR_FONT_METRICS",
 
     "SK_USE_DISCARDABLE_SCALEDIMAGECACHE",
   ]
 
   if (cpu_arch == "arm") {
     if (arm_use_neon) {
       defines += [ "__ARM_HAVE_NEON" ]
     }
@@ skipping 517 matching lines @@
     ":skia_config",
     "//build/config/compiler:no_chromium_code"
   ]
 
   deps = [
     "//base",
   ]
 
   visibility = ":skia"
 }