Enable history and downloads by default, port NewTabUI from DOMUIHost to DOMU...

chrome/browser/dom_ui/dom_ui_host.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// DOMUIHost is a special type of TabContents that can display Chrome-specific
-// content using HTML.
-// It provides methods to send data to and from the page Javascript.
-
-// TODO(evanm): Add more limitations on what the contents of this view
-//              can do (especially regarding network requests).
+// THIS FILE IS DEPRECATED, USE DOM_UI INSTEAD.
 
 #ifndef CHROME_BROWSER_DOM_UI_DOM_UI_HOST_H__
 #define CHROME_BROWSER_DOM_UI_DOM_UI_HOST_H__
 
+#include "chrome/browser/dom_ui/dom_ui.h"
 #include "chrome/browser/tab_contents/web_contents.h"
 #include "webkit/glue/webpreferences.h"
 
 class DOMMessageDispatcher;
 class RenderProcessHost;
 class RenderViewHost;
 class Value;
 
-// Messages sent from the DOM are forwarded via the DOMUIHost to handler
-// classes.  These objects are owned by DOMUIHost and destroyed when the
-// host is destroyed.
-class DOMMessageHandler {
- public:
-  virtual ~DOMMessageHandler() {}
-};
-
 // See the comments at the top of this file.
 class DOMUIHost : public WebContents {
  public:
   DOMUIHost(Profile* profile,
             SiteInstance* instance,
             RenderViewHostFactory* render_view_factory);
 
   // Initializes the given renderer, after enabling DOM UI bindings on it.
   virtual bool CreateRenderViewForRenderManager(
       RenderViewHost* render_view_host);
@@ skipping 55 matching lines @@
 
   // A map of message name -> message handling callback.
   typedef std::map<std::string, MessageCallback*> MessageCallbackMap;
   MessageCallbackMap message_callbacks_;
 
   DISALLOW_EVIL_CONSTRUCTORS(DOMUIHost);
 };
 
 #endif  // CHROME_BROWSER_DOM_UI_DOM_UI_HOST_H__