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

gin/runner.cc

Index: gin/runner.cc
diff --git a/gin/runner.cc b/gin/runner.cc
index 37e16a09c748ae1c33bf963d22729e4061b99860..d2dda36c8ff2315fb4b9f82789bbd6a8ce1000c7 100644
--- a/gin/runner.cc
+++ b/gin/runner.cc
@@ -37,6 +37,7 @@ void RunnerDelegate::DidRunScript(Runner* runner) {
 }
 
 void RunnerDelegate::UnhandledException(Runner* runner, TryCatch& try_catch) {
+  CHECK(false) << try_catch.GetStackTrace();

[Aaron Boodman, 2013/12/21 01:44:30]

This seems like a better default behavior than what there was before.

 }
 
 Runner::Runner(RunnerDelegate* delegate, Isolate* isolate)
@@ -59,8 +60,12 @@ Runner::~Runner() {
 }
 
 void Runner::Run(const std::string& source, const std::string& resource_name) {
+  TryCatch try_catch;
   Run(Script::New(StringToV8(isolate(), source),
                   StringToV8(isolate(), resource_name)));
+  if (try_catch.HasCaught()) {
+    delegate_->UnhandledException(this, try_catch);
+  }
 }
 
 void Runner::Run(v8::Handle<Script> script) {
@@ -70,8 +75,9 @@ void Runner::Run(v8::Handle<Script> script) {
   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,