Implement Blink-in-JS for DOM methods

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/ui.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/core/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/modules.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
@@ skipping 918 matching lines @@
 
 # "MakeTokenMatcherForViewport" in make_core_generated from GYP.
 make_token_matcher("make_core_generated_make_token_matcher_for_viewport") {
   input_file = "html/HTMLMetaElement-in.cpp"
   output_file = "$blink_core_output_dir/HTMLMetaElement.cpp"
 }
 
 # One-off scripts --------------------------------------------------------------
 
 # "generatePrivateScript" in make_core_generated from GYP.
+# FIXME: The implementation of Blink-in-JS is not yet mature.
+# You can use Blink-in-JS in your local experiment, but don't ship it.
+# crbug.com/341031
 action("make_core_generated_private_script") {
   visibility = ":make_core_generated"
   script = "../build/scripts/make_private_script_source.py"
 
   source_prereqs = [
     "../bindings/core/v8/PrivateScriptRunner.js",
   ]
   outputs = [
     "$blink_core_output_dir/PrivateScriptSources.h",
   ]
 
   args = rebase_path(outputs, root_build_dir)
   args += rebase_path(source_prereqs, root_build_dir)
 
   deps = make_core_generated_deps
 }
 
+action("make_core_generated_private_script_for_testing") {
+  visibility = ":make_core_generated"
+  script = "../build/scripts/make_private_script_source.py"
+
+  source_prereqs = [
+    "testing/Internals.js",
+  ]
+  outputs = [
+    "$blink_core_output_dir/PrivateScriptSourcesForTesting.h",
+  ]
+
+  args = rebase_path(outputs, root_build_dir)
+  args += rebase_path(source_prereqs, root_build_dir)
+
+  deps = make_core_generated_deps
+}
+
 # "generateXMLViewerCSS" in make_core_generated from GYP.
 action("make_core_generated_xml_viewer_css") {
   visibility = ":make_core_generated"
   script = "../build/scripts/xxd.py"
 
   source_prereqs = [
     "xml/XMLViewer.css",
   ]
   outputs = [
     "$blink_core_output_dir/XMLViewerCSS.h",
@@ skipping 141 matching lines @@
     "$blink_core_output_dir/{{source_name_part}}.h",
   ]
   args = [
     "{{source}}",
     rel_blink_core_gen_dir,
     bison_exe,
   ]
 
   deps = make_core_generated_deps
 }