Updated top level docs for Window.

tools/dom/docs/docs.json

Index: tools/dom/docs/docs.json
diff --git a/tools/dom/docs/docs.json b/tools/dom/docs/docs.json
index a787d3cfe06cddf98c3c35e5ee82aa33ea4642ac..82c67375baad2286373ec33a8310046842cab929 100644
--- a/tools/dom/docs/docs.json
+++ b/tools/dom/docs/docs.json
@@ -310,6 +310,37 @@
         ]
       }
     },
+    "Window": {
+      "comment": [
+        "/**",
+        " * Top-level container for the current browser tab or window.",
+        " *",
+        " * In a web browser, each window has a [Window] object, but within the context",
+        " * of a script, a [Window] object represents only the current window. In",
+        " * addition to the open window, each window, tab, and iframe has its own",
+        " * [Window] object. A [Window] contains a [Document] object, which contains this",
+        " * web page's content.",
+        " *",
+        " * Use `window` to access properties of the current window. For example:",
+        " *",
+        " *     // Draw a scene when the window repaints.",
+        " *     drawScene(num delta) {...}",
+        " *     window.animationFrame.then(drawScene);.",
+        " *",
+        " *     // Write to the console.",
+        " *     window.console.log('Jinkies!');",
+        " *     window.console.error('Jeepers!');",
+        " *",
+        " * **Note:** This class represents the current window, whereas [WindowBase] is",
+        " * a representation of any window, including other tabs, windows, and frames.",
+        " *",
+        " * ## Other resources",
+        " *",
+        " * * [DOM Window](https://developer.mozilla.org/en-US/docs/DOM/window) from MDN.",
+        " * * [Window](http://www.w3.org/TR/Window/) from the W3C.",
+        " */"
+      ]
+    },
     "XMLHttpRequest": {
       "members": {
         "abort": [