[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/bindings/scripts/scripts.gni

Index: third_party/WebKit/Source/bindings/scripts/scripts.gni
diff --git a/third_party/WebKit/Source/bindings/scripts/scripts.gni b/third_party/WebKit/Source/bindings/scripts/scripts.gni
index fc7b26c7520276ce4dfef881285737bb4f3f4e80..94b609ce45d1af15c6d1a2ab6c5e32db0d259b06 100644
--- a/third_party/WebKit/Source/bindings/scripts/scripts.gni
+++ b/third_party/WebKit/Source/bindings/scripts/scripts.gni
@@ -297,6 +297,37 @@ template("idl_impl") {
   }
 }
 
+template("idl_snapshot") {
+  action(target_name) {
+    script = "//third_party/WebKit/Source/bindings/scripts/generate_snapshot.py"
+
+    inputs = invoker.sources + [ script ]
+    outputs = invoker.outputs
+
+    response_file_contents = rebase_path(invoker.sources, root_build_dir)
+    args = [
+      "--cache-dir",
+      rebase_path(bindings_scripts_output_dir, root_build_dir),
+      "--output-dir",
+      rebase_path(invoker.output_dir, root_build_dir),
+      "--idl-files-list",
+      "{{response_file_name}}",
+      "--info-dir",
+      rebase_path("$bindings_output_dir", root_build_dir),
+      "--target-component",
+      invoker.target_component,
+    ]
+
+    deps = [
+      "//third_party/WebKit/Source/bindings/core:interfaces_info_individual_core",
+      "//third_party/WebKit/Source/bindings/modules:interfaces_info",
+      "//third_party/WebKit/Source/bindings/modules:interfaces_info_individual_modules",
+      "//third_party/WebKit/Source/bindings/scripts:cached_jinja_templates",
+      "//third_party/WebKit/Source/bindings/scripts:cached_lex_yacc_tables",
+    ]
+  }
+}
+
 # Calls the aggregate_generated_bindings script.
 #
 # Parameters: