Enable new tab page for Mac and Linux

chrome/browser/tab_contents/tab_contents_factory.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 "base/string_util.h"
 #include "chrome/browser/browser_about_handler.h"
 #include "chrome/browser/browser_url_handler.h"
 #include "chrome/browser/dom_ui/dom_ui_contents.h"
 #include "chrome/browser/dom_ui/new_tab_ui.h"
 #include "chrome/browser/profile.h"
@@ skipping 42 matching lines @@
       break;
 // TODO(port): remove this platform define, either by porting the tab contents
 // types or removing them completely.
 #if defined(OS_WIN)
     case TAB_CONTENTS_HTML_DIALOG:
       contents = new HtmlDialogContents(profile, instance, NULL);
       break;
     case TAB_CONTENTS_NATIVE_UI:
       contents = new NativeUIContents(profile);
       break;
+#endif  // defined(OS_WIN)
     case TAB_CONTENTS_DEBUGGER:
     case TAB_CONTENTS_NEW_TAB_UI:
     case TAB_CONTENTS_DOM_UI:
       contents = new DOMUIContents(profile, instance, NULL);
       break;
-#endif  // defined(OS_WIN)
     default:
       if (g_extra_types) {
         TabContentsFactoryMap::const_iterator it = g_extra_types->find(type);
         if (it != g_extra_types->end()) {
           contents = it->second->CreateInstance();
           break;
         }
       }
       NOTREACHED() << "Don't know how to create tab contents of type " << type;
       contents = NULL;
@@ skipping 28 matching lines @@
     return TAB_CONTENTS_NATIVE_UI;
 
   if (HtmlDialogContents::IsHtmlDialogUrl(*url))
     return TAB_CONTENTS_HTML_DIALOG;
 
   if (DebuggerContents::IsDebuggerUrl(*url))
     return TAB_CONTENTS_DEBUGGER;
 
   if (url->SchemeIs(DOMUIContents::GetScheme().c_str()))
     return TAB_CONTENTS_DOM_UI;
-
 #elif defined(OS_POSIX)
   TabContentsType type(TAB_CONTENTS_UNKNOWN_TYPE);
   if (BrowserURLHandler::HandleBrowserURL(url, &type) &&
       type == TAB_CONTENTS_ABOUT_UI) {
     return type;
   }
+  if (url->SchemeIs(DOMUIContents::GetScheme().c_str()))
+    return TAB_CONTENTS_DOM_UI;
   NOTIMPLEMENTED();
 #endif
 
   // NOTE: Even the empty string can be loaded by a WebContents.
   return TAB_CONTENTS_WEB;
 }
 
 // static
 TabContentsFactory* TabContents::RegisterFactory(TabContentsType type,
                                                  TabContentsFactory* factory) {
@@ skipping 11 matching lines @@
     g_extra_types->erase(type);
     if (g_extra_types->empty()) {
       delete g_extra_types;
       g_extra_types = NULL;
     }
   }
 
   return prev_factory;
 }