Make BrowserWindow inheritable. Fixed #23.

browser/api/lib/browser-window.coffee

@@ -2,28 +2,30 @@ EventEmitter = require('events').EventEmitter
 v8Util = process.atomBinding 'v8_util'
 objectsRegistry = require '../../atom/objects-registry.js'
 
-BrowserWindow = process.atomBinding('window').BrowserWindow
-BrowserWindow::__proto__ = EventEmitter.prototype
+Window = process.atomBinding('window').Window
+Window::__proto__ = EventEmitter.prototype
 
-BrowserWindow::toggleDevTools = ->
-  opened = v8Util.getHiddenValue this, 'devtoolsOpened'
-  if opened
-    @closeDevTools()
-    v8Util.setHiddenValue this, 'devtoolsOpened', false
-  else
-    @openDevTools()
-    v8Util.setHiddenValue this, 'devtoolsOpened', true
+module.exports = class BrowserWindow extends Window
+  constructor: ->
+    super
 
-BrowserWindow::restart = ->
-  @loadUrl(@getUrl())
+  toggleDevTools: ->
+    opened = v8Util.getHiddenValue this, 'devtoolsOpened'
+    if opened
+      @closeDevTools()
+      v8Util.setHiddenValue this, 'devtoolsOpened', false
+    else
+      @openDevTools()
+      v8Util.setHiddenValue this, 'devtoolsOpened', true
 
-BrowserWindow.getFocusedWindow = ->
-  windows = objectsRegistry.getAllWindows()
-  return window for window in windows when window.isFocused()
+  restart: ->
+    @loadUrl @getUrl()
 
-BrowserWindow.fromProcessIdAndRoutingId = (processId, routingId) ->
-  windows = objectsRegistry.getAllWindows()
-  return window for window in windows when window.getProcessId() == processId and
-                                           window.getRoutingId() == routingId
+  @getFocusedWindow: ->
+    windows = objectsRegistry.getAllWindows()
+    return window for window in windows when window.isFocused()
 
-module.exports = BrowserWindow
+  @fromProcessIdAndRoutingId = (processId, routingId) ->
+    windows = objectsRegistry.getAllWindows()
+    return window for window in windows when window.getProcessId() == processId and
+                                             window.getRoutingId() == routingId