Add a simple one shot and repeating timer API for Mojo.js.

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/per_context_data.h"
 #include "gin/try_catch.h"
 
@@ skipping 19 matching lines @@
 void RunnerDelegate::DidCreateContext(Runner* runner) {
 }
 
 void RunnerDelegate::WillRunScript(Runner* runner) {
 }
 
 void RunnerDelegate::DidRunScript(Runner* runner) {
 }
 
 void RunnerDelegate::UnhandledException(Runner* runner, TryCatch& try_catch) {
+  CHECK(false) << try_catch.GetStackTrace();
 }
 
 Runner::Runner(RunnerDelegate* delegate, Isolate* isolate)
     : ContextHolder(isolate),
       delegate_(delegate),
       weak_factory_(this) {
   v8::Isolate::Scope isolate_scope(isolate);
   HandleScope handle_scope(isolate);
   v8::Handle<v8::Context> context =
       Context::New(isolate, NULL, delegate_->GetGlobalTemplate(this));
@@ skipping 20 matching lines @@
   Run(script);
 }
 
 void Runner::Run(v8::Handle<Script> script) {
   TryCatch try_catch;
   delegate_->WillRunScript(this);
 
   script->Run();
 
   delegate_->DidRunScript(this);
-  if (try_catch.HasCaught())
+  if (try_catch.HasCaught()) {
     delegate_->UnhandledException(this, try_catch);
+  }
 }
 
 v8::Handle<v8::Value> Runner::Call(v8::Handle<v8::Function> function,
                                    v8::Handle<v8::Value> receiver,
                                    int argc,
                                    v8::Handle<v8::Value> argv[]) {
   TryCatch try_catch;
   delegate_->WillRunScript(this);
 
   v8::Handle<v8::Value> result = function->Call(receiver, argc, argv);
 
   delegate_->DidRunScript(this);
   if (try_catch.HasCaught()) {
     delegate_->UnhandledException(this, try_catch);
   }
 
   return result;
 }
 
 Runner::Scope::Scope(Runner* runner)
     : isolate_scope_(runner->isolate()),
       handle_scope_(runner->isolate()),
       scope_(runner->context()) {
 }
 
 Runner::Scope::~Scope() {
 }
 
 }  // namespace gin