Infrastructure for reading V8's initial snapshot from external files

mojo/apps/js/application_delegate_impl.cc

 // 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.
 
 #include "mojo/apps/js/application_delegate_impl.h"
 
 #include "gin/array_buffer.h"
 #include "gin/public/isolate_holder.h"
 #include "mojo/apps/js/js_app.h"
 #include "mojo/public/cpp/application/application_impl.h"
 
 namespace mojo {
 namespace apps {
 
 ApplicationDelegateImpl::ApplicationDelegateImpl()
     : application_impl_(nullptr) {
 }
 
 void ApplicationDelegateImpl::Initialize(ApplicationImpl* app) {
   application_impl_ = app;
+
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+  gin::IsolateHolder::LoadV8Snapshot();
+#endif
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
                                  gin::ArrayBufferAllocator::SharedInstance());
 }
 
 ApplicationDelegateImpl::~ApplicationDelegateImpl() {
 }
 
 void ApplicationDelegateImpl::StartJSApp(scoped_ptr<JSApp> app_ptr) {
   JSApp *app = app_ptr.release();
   app_vector_.push_back(app);
@@ skipping 16 matching lines @@
     const std::string& interface_name) {
   CHECK(application_impl_);
   ServiceProvider* service_provider =
       application_impl_->ConnectToApplication(application_url)
           ->GetServiceProvider();
   service_provider->ConnectToService(interface_name, pipe_handle.Pass());
 }
 
 }  // namespace apps
 }  // namespace mojo