postMessage

<script>

	//web страница
	
	setTimeout(function(){
		
	
		var data = { type: "my_window", act: 'go' };
		window.postMessage(data, "*");	
	
	}, 1000);
	
</script>

<script>

	//скрипт chrome приложения
	
	window.addEventListener("message", function(event) {
		// We only accept messages from ourselves
		if (event.source != window)
			return;

		if (event.data.type && (event.data.type == "my_window")) {
			
			console.log('act:');
			console.log(event.data.act);
			
			
		}
	});
	
</script>