[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/bindings/modules/v8/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("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
 import("//third_party/WebKit/Source/modules/modules_idl_files.gni")
 
 visibility = [ "//third_party/WebKit/*" ]
 
 group("bindings_modules_generated") {
   public_deps = [
     ":bindings_modules_impl_generated",
     ":bindings_modules_v8_generated_init_partial",
+    ":bindings_v8_generated_reference_table",

[Yuki, 2017/05/12 15:20:10]

"reference_table" seems not clear about what it is.

"bindings_v8_(context_)snapshot_external_references" for example?
I'm not insisting to this name.  Any better names are welcome.

[peria, 2017/06/01 08:33:31]

Done.

     ":generate_bindings_modules_v8_interfaces",
     ":generate_bindings_modules_v8_partial_interfaces",
   ]
 }
 
 idl_compiler("generate_bindings_modules_v8_interfaces") {
   sources = modules_definition_idl_files
   output_dir = bindings_modules_v8_output_dir
   output_name_suffix = ""
   target_component = "modules"
@@ skipping 35 matching lines @@
     "{{response_file_name}}",
     "--output",
     rebase_path(bindings_modules_generated_init_partial_interfaces_file,
                 root_build_dir),
   ]
 
   deps = [
     "//third_party/WebKit/Source/bindings/modules:interfaces_info",
   ]
 }
+
+idl_reference_table("bindings_v8_generated_reference_table") {
+  sources = core_idl_files + core_idl_with_modules_dependency_files +
+            modules_definition_idl_files
+  target_component = "modules"
+  outputs = bindings_generated_reference_files
+  output_dir = bindings_modules_v8_output_dir
+}