Enable new tab page for Mac and Linux

chrome/browser/dom_ui/dom_ui_contents.cc

 // 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.
 
 #include "chrome/browser/dom_ui/dom_ui_contents.h"
 
 #include "chrome/browser/debugger/debugger_contents.h"
 #include "chrome/browser/dom_ui/dev_tools_ui.h"
 #include "chrome/browser/dom_ui/dom_ui.h"
 #include "chrome/browser/dom_ui/downloads_ui.h"
@@ skipping 215 matching lines @@
   DCHECK(current_ui_);
   current_ui_->ProcessDOMUIMessage(message, content);
 }
 
 // static
 const std::string DOMUIContents::GetScheme() {
   return chrome::kChromeUIScheme;
 }
 
 DOMUI* DOMUIContents::GetDOMUIForURL(const GURL &url) {
-#if defined(OS_WIN)
-// TODO(port): include this once these are converted to HTML
   if (url.host() == NewTabUI::GetBaseURL().host() ||
       url.SchemeIs(chrome::kChromeInternalScheme)) {
     return new NewTabUI(this);
-  } else if (url.host() == HistoryUI::GetBaseURL().host()) {
+  }
+#if defined(OS_WIN)
+// TODO(port): include this once these are converted to HTML
+  if (url.host() == HistoryUI::GetBaseURL().host()) {
     return new HistoryUI(this);
   } else if (url.host() == DownloadsUI::GetBaseURL().host()) {
     return new DownloadsUI(this);
   } else if (url.host() == DebuggerContents::GetBaseURL().host()) {
     return new DebuggerContents(this);
   } else if (url.host() == DevToolsUI::GetBaseURL().host()) {
     return new DevToolsUI(this);
   }
 #else
   NOTIMPLEMENTED();
 #endif
   return NULL;
 }