stubbing out some overlay framework

src/content/overlay.js

@@ -0,0 +1,34 @@
+!(function () {
+    chrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) {
+        if (msg.command === 'openOverlayPopup') {
+            openPopup(msg.data);
+            sendResponse();
+            return true;
+        }
+        else if (msg.command === 'closeOverlayPopup') {
+            closePopup();
+            sendResponse();
+            return true;
+        }
+    });
+
+    function openPopup(data) {
+        var left = 0,
+            top = 0;
+
+        if (data && data.position) {
+            left = data.position.left || 0;
+            top = data.position.top || 0;
+        }
+
+        var iframe = document.createElement('iframe');
+        iframe.src = chrome.extension.getURL('overlay/popup.html');
+        iframe.style.cssText = 'height: 200px; width: 250px; border: 2px solid #000;; position: absolute; visibility: visible; left: ' + left + '; top: ' + top + '; z-index: 999999999;';
+        iframe.id = 'bit-overlay-popup';
+        document.body.insertBefore(iframe, document.body.lastChild);
+    }
+
+    function closePopup() {
+        document.getElementById('bit-overlay-popup').remove();
+    }
+})();