add mole collapse/expand events. convert mappy to use this.

chrome/test/data/extensions/samples/mappy/mappy_toolstrip.html

+<style>
+#map {
+  display: none;
+  width: 512px;
+  height: 512px;
+}
+</style>
 <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAATfHumDbW3OmRByfquHd3SRTRERdeAiwZ9EeJWta3L_JZVS0bOBRQeZgr4K0xyVKzUdnnuFl8X9PX0w&sensor=false"
         type="text/javascript"></script>
 <script>
 var maps_key = "ABQIAAAATfHumDbW3OmRByfquHd3SRTRERdeAiwZ9EeJWta3L_JZVS0bOBRQeZgr4K0xyVKzUdnnuFl8X9PX0w";
 
+chrome.toolstrip.onCollapsed.addListener(function() {
+  var map = document.getElementById("map");
+  map.src = "";
+  map.style.display = "none";
+  var button = document.getElementById("button");
+  button.style.display = "block";
+});
+
+function expand(url) {
+  var button = document.getElementById("button");
+  button.style.display = "none";
+  var map = document.getElementById("map");
+  map.src = url;
+  map.style.display = "block";
+  chrome.toolstrip.expand({height:512}, function() {});
+}
+
+function collapse() {
+  chrome.toolstrip.collapse({}, function() {});
+}
+
 function gclient_geocode(address) {
   var geocoder = new GClientGeocoder();
   geocoder.getLatLng(address, function(point) {
     if (!point) {
       console.log(address + " not found");
     } else {
       var latlng = point.toUrlValue();
       var url = "http://maps.google.com/staticmap?center=" + latlng +
                 "&markers=" + latlng + "&zoom=14" +
                 "&size=512x512&sensor=false&key=" + maps_key;
-      document.body.style.width = "512px";
-      setTimeout(chrome.toolstrip.expand, 100, {height:512, url:url});
+      expand(url);
     }
   });
 }
 
 function map() {
   chrome.tabs.getSelected(null, function(tab) {
     var port = chrome.tabs.connect(tab.id);
     if (!port) {
       console.log("no port");
     } else {
       port.onMessage.addListener(function(data) {
         var address = data.values[0];
         gclient_geocode(address);
       });
       port.postMessage({message: "hello tab: " + tab.id});
     }
   });
 };
 </script>
-<div class="toolstrip-button" onclick="map()">
+<div id="button" class="toolstrip-button" onclick="map()">
 <span>Mappy</span>
 </div>
+<img id="map" onclick="collapse()">