Allow WorkspaceView to be instantiated directly for compatibility

src/workspace-view.coffee

@@ -10,6 +10,7 @@ fs = require 'fs-plus'
 PaneView = require './pane-view'
 PaneContainerView = require './pane-container-view'
 Editor = require './editor'
+Workspace = require './workspace'
 
 # Extended: The top-level view for the entire window. An instance of this class is
 # available via the `atom.workspaceView` global.
@@ -66,7 +67,9 @@ class WorkspaceView extends View
     destroyEmptyPanes: true
 
   constructor: (@element) ->
+    @element ?= atom.workspace.getView(atom.workspace)
     super
+    @setModel(atom.workspace) unless @model?
     @deprecateViewEvents()
 
   setModel: (@model) ->