Port Mojo's sample_service.cc to JavaScript

gin/runner.cc

 // Copyright 2013 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 "gin/runner.h"
 
 #include "gin/converter.h"
 #include "gin/try_catch.h"
 
 using v8::Context;
@@ skipping 39 matching lines @@
 }
 
 Runner::~Runner() {
 }
 
 void Runner::Run(const std::string& script) {
   Run(Script::New(StringToV8(isolate(), script)));
 }
 
 void Runner::Run(v8::Handle<Script> script) {
+  TryCatch try_catch;
   delegate_->WillRunScript(this, script);
-  {
-    TryCatch try_catch;
-    script->Run();
-    if (try_catch.HasCaught())
-      delegate_->UnhandledException(this, try_catch);
-  }
+  script->Run();
   delegate_->DidRunScript(this, script);
+  if (try_catch.HasCaught())
+    delegate_->UnhandledException(this, try_catch);
 }
 
 Runner::Scope::Scope(Runner* runner)
     : handle_scope_(runner->isolate()),
       scope_(runner->context()) {
 }
 
 Runner::Scope::~Scope() {
 }
 
 }  // namespace gin