Remove more blink modules gypi code.

third_party/WebKit/Source/core/BUILD.gn

 # Copyright 2014 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/chromecast_build.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
@@ skipping 487 matching lines @@
 
   in_files = [ "svg/SVGTagNames.in" ]
   other_inputs = make_element_type_helpers_files
   outputs = [
     "$blink_core_output_dir/SVGElementTypeHelpers.h",
   ]
 }
 
 # make_event_factory -----------------------------------------------------------
 
-process_in_files("make_core_generated_event_factory") {
-  script = "../build/scripts/make_event_factory.py"
-
+make_event_factory("make_core_generated_event_factory") {
   in_files = [
     "$blink_core_output_dir/EventInterfaces.in",
     "events/EventAliases.in",
   ]
-  other_inputs = make_event_factory_files
   outputs = [
     "$blink_core_output_dir/Event.cpp",
     "$blink_core_output_dir/EventHeaders.h",
   ]
 }
 
 # make_names -------------------------------------------------------------------
 
 process_in_files("make_core_generated_media_feature_names") {
   script = "../build/scripts/make_media_feature_names.py"
@@ skipping 709 matching lines @@
   sources = [
     "html/parser/HTMLPreloadScannerFuzzer.cpp",
     "html/parser/TextResourceDecoderForFuzzing.h",
   ]
   seed_corpus = "//third_party/WebKit/LayoutTests/fast/parser"
   deps = [
     ":core",
     "../platform:blink_fuzzer_test_support",
   ]
 }