Finished off HTML Window blurb + link for every member.

tools/dom/templates/html/impl/impl_Window.darttemplate

Index: tools/dom/templates/html/impl/impl_Window.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Window.darttemplate b/tools/dom/templates/html/impl/impl_Window.darttemplate
index 6eea393004ac7e9de51d4b7f33f2401ff3104813..d7dadf4408cc2159aa008d906ab4be1ad64f71db 100644
--- a/tools/dom/templates/html/impl/impl_Window.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Window.darttemplate
@@ -51,6 +51,16 @@ $if DART2JS
   WindowBase _open3(url, name, options) =>
       JS('Window', '#.open(#,#,#)', this, url, name, options);
 
+  /**
+   * Opens a new window.
+   *
+   * ## Other resources
+   *
+   * * [Window.open]
+   * (https://developer.mozilla.org/en-US/docs/Web/API/Window.open) from MDN.
+   * * [Window open]
+   * (http://docs.webplatform.org/wiki/dom/methods/open) from WebPlatform.org.
+   */
   WindowBase open(String url, String name, [String options]) {
     if (options == null) {
       return _DOMWindowCrossFrame._createSafe(_open2(url, name));