Port Mojo's sample_service.cc to JavaScript

gin/runner.cc

Index: gin/runner.cc
diff --git a/gin/runner.cc b/gin/runner.cc
index a3c9544872954967a3dd99197cb554a2574b0544..46671c592a1e7caf4c98b285c14e97dc112ab8b4 100644
--- a/gin/runner.cc
+++ b/gin/runner.cc
@@ -57,14 +57,12 @@ void Runner::Run(const std::string& 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)