Browser Plugin: Implement Back, Forward, and Go.

content/test/data/browser_plugin_embedder.html

Index: content/test/data/browser_plugin_embedder.html
diff --git a/content/test/data/browser_plugin_embedder.html b/content/test/data/browser_plugin_embedder.html
index 31a78467a65d57d70e50da1e131de0351542d808..fb70190a767173c43b5f411923db241b084328da 100644
--- a/content/test/data/browser_plugin_embedder.html
+++ b/content/test/data/browser_plugin_embedder.html
@@ -1,13 +1,25 @@
 <script type="text/javascript">
 function SetSrc(src) {
-  plugin = document.getElementById('plugin');
+  var plugin = document.getElementById('plugin');
   plugin.src = src;
 }
 function SetSize(w, h) {
-  plugin = document.getElementById('plugin');
+  var plugin = document.getElementById('plugin');
   plugin.width = w;
   plugin.height = h;
 }
+function Back() {
+  var plugin = document.getElementById('plugin');
+  plugin.back();
+}
+function Forward() {
+  var plugin = document.getElementById('plugin');
+  plugin.forward();
+}
+function Go(relativeIndex) {
+  var plugin = document.getElementById('plugin');
+  plugin.go(relativeIndex);
+}
 </script>
 
 <object id="plugin"