[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/bindings/core/v8/V8DOMConfiguration.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 452 matching lines @@
     signature = v8::Local<v8::Signature>();
 
   const unsigned location = config.property_location_configuration;
   DCHECK(location);
   if (location &
       (V8DOMConfiguration::kOnInstance | V8DOMConfiguration::kOnPrototype)) {
     v8::Local<v8::FunctionTemplate> function_template =
         v8::FunctionTemplate::New(isolate, callback, v8::Local<v8::Value>(),
                                   signature, config.length);
     function_template->RemovePrototype();
-    if (config.access_check_configuration == V8DOMConfiguration::kCheckAccess)
+    if (config.access_check_configuration == V8DOMConfiguration::kCheckAccess) {
       function_template->SetAcceptAnyReceiver(false);
+    }
     v8::Local<v8::Function> function =
         function_template->GetFunction(isolate->GetCurrentContext())
             .ToLocalChecked();
-    if (location & V8DOMConfiguration::kOnInstance && !instance.IsEmpty())
+    if (location & V8DOMConfiguration::kOnInstance && !instance.IsEmpty()) {
       instance
           ->DefineOwnProperty(
               isolate->GetCurrentContext(), name, function,
               static_cast<v8::PropertyAttribute>(config.attribute))
           .ToChecked();
-    if (location & V8DOMConfiguration::kOnPrototype && !prototype.IsEmpty())
+    }
+    if (location & V8DOMConfiguration::kOnPrototype && !prototype.IsEmpty()) {
       prototype
           ->DefineOwnProperty(
               isolate->GetCurrentContext(), name, function,
               static_cast<v8::PropertyAttribute>(config.attribute))
           .ToChecked();
+    }
   }
   if (location & V8DOMConfiguration::kOnInterface && !interface.IsEmpty()) {
     // Operations installed on the interface object must be static
     // operations, so no need to specify a signature, i.e. no need to do
     // type check against a holder.
     v8::Local<v8::FunctionTemplate> function_template =
         v8::FunctionTemplate::New(isolate, callback, v8::Local<v8::Value>(),
                                   v8::Local<v8::Signature>(), config.length);
     function_template->RemovePrototype();
     v8::Local<v8::Function> function =
@@ skipping 246 matching lines @@
     prototype_template->SetInternalFieldCount(kV8PrototypeInternalFieldcount);
   }
 }
 
 v8::Local<v8::FunctionTemplate> V8DOMConfiguration::DomClassTemplate(
     v8::Isolate* isolate,
     const DOMWrapperWorld& world,
     WrapperTypeInfo* wrapper_type_info,
     InstallTemplateFunction configure_dom_class_template) {
   V8PerIsolateData* data = V8PerIsolateData::From(isolate);
-  v8::Local<v8::FunctionTemplate> result =
+  v8::Local<v8::FunctionTemplate> interface_template =
       data->FindInterfaceTemplate(world, wrapper_type_info);
-  if (!result.IsEmpty())
-    return result;
+  if (!interface_template.IsEmpty())
+    return interface_template;
 
-  result = v8::FunctionTemplate::New(
+  interface_template = v8::FunctionTemplate::New(
       isolate, V8ObjectConstructor::IsValidConstructorMode);
-  configure_dom_class_template(isolate, world, result);
-  data->SetInterfaceTemplate(world, wrapper_type_info, result);
-  return result;
+  configure_dom_class_template(isolate, world, interface_template);
+  data->SetInterfaceTemplate(world, wrapper_type_info, interface_template);
+  return interface_template;
 }
 
 void V8DOMConfiguration::SetClassString(
     v8::Isolate* isolate,
     v8::Local<v8::ObjectTemplate> object_template,
     const char* class_string) {
   object_template->Set(
       v8::Symbol::GetToStringTag(isolate),
       V8AtomicString(isolate, class_string),
       static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontEnum));
 }
 
 }  // namespace blink