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

chrome/browser/dom_ui/dom_ui.h

Index: chrome/browser/dom_ui/dom_ui.h
===================================================================
--- chrome/browser/dom_ui/dom_ui.h	(revision 10343)
+++ chrome/browser/dom_ui/dom_ui.h	(working copy)
@@ -42,6 +42,20 @@
                               const Value& arg1,
                               const Value& arg2);
 
+  // Overriddable control over the contents.
+  // Favicon should be displayed normally.
+  virtual bool ShouldDisplayFavIcon() { return true; }
+  // No special bookmark bar behavior
+  virtual bool IsBookmarkBarAlwaysVisible() { return false; }
+  // When NTP gets the initial focus, focus the URL bar.
+  virtual void SetInitialFocus() {};
+  // Whether we want to display the page's URL.
+  virtual bool ShouldDisplayURL() { return true; }
+  // Hide the referrer.
+  virtual void RequestOpenURL(const GURL& url, const GURL&,
+      WindowOpenDisposition disposition);
+
+  DOMUIContents* get_contents() { return contents_; }
   Profile* get_profile() { return contents_->profile(); }
 
  protected:
@@ -69,7 +83,7 @@
 class DOMMessageHandler {
  public:
   explicit DOMMessageHandler(DOMUI* dom_ui);
-  virtual ~DOMMessageHandler();
+  virtual ~DOMMessageHandler() {};
 
  protected:
   // Adds "url" and "title" keys on incoming dictionary, setting title
@@ -90,5 +104,4 @@
   DISALLOW_COPY_AND_ASSIGN(DOMMessageHandler);
 };
 
-
 #endif  // CHROME_BROWSER_DOM_UI_H__