Use gypi form of blink_skia_config.

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")
 }
 
 skia_support_gpu = !is_ios
 skia_support_pdf = !is_ios && printing_mode != 0
 
+# The list of Skia defines that are to be set for blink.
+gypi_blink_skia_defines = exec_script(
+    "//build/gypi_to_gn.py",
+    [ rebase_path("//third_party/WebKit/public/blink_skia_config.gypi"),
+      "--replace=<(skia_include_path)=//third_party/skia/include",
+      "--replace=<(skia_src_path)=//third_party/skia/src" ],
+    "scope",
+    [ "//third_party/WebKit/public/blink_skia_config.gypi" ])
+
 # The list of Skia defines that are to be set for chromium.
 gypi_skia_defines = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("//third_party/skia/gyp/skia_for_chromium_defines.gypi"),
       "--replace=<(skia_include_path)=//third_party/skia/include",
       "--replace=<(skia_src_path)=//third_party/skia/src" ],
     "scope",
     [ "//third_party/skia/gyp/skia_for_chromium_defines.gypi" ])
 
 # The list of Skia core sources that are to be set for chromium.
@@ skipping 67 matching lines @@
     "//third_party/skia/include/utils",
     "//third_party/skia/src/core",
     "//third_party/skia/src/image",
     "//third_party/skia/src/opts",
     "//third_party/skia/src/ports",
     "//third_party/skia/src/sfnt",
     "//third_party/skia/src/utils",
     "//third_party/skia/src/lazy",
   ]
 
-  defines = gypi_skia_defines.skia_for_chromium_defines
+  defines = gypi_blink_skia_defines.blink_skia_defines
+  defines += gypi_skia_defines.skia_for_chromium_defines
 
   defines += [
     "SK_ENABLE_INST_COUNT=0",
     "GR_GL_CUSTOM_SETUP_HEADER=\"GrGLConfig_chrome.h\"",
     "SK_ENABLE_LEGACY_API_ALIASING=1",
     "SK_ATTR_DEPRECATED=SK_NOTHING_ARG1",
     "GR_GL_IGNORE_ES3_MSAA=0",
     "SK_WILL_NEVER_DRAW_PERSPECTIVE_TEXT",
     "SK_SUPPORT_LEGACY_GETTOTALCLIP",
   ]
@@ skipping 591 matching lines @@
     ":skia_library_config",
     "//build/config/compiler:no_chromium_code"
   ]
 
   deps = [
     "//base",
   ]
 
   visibility = [ ":skia" ]
 }