Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

chrome/browser/ui/webui/ntp/ntp_login_handler.cc

 // Copyright (c) 2011 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/ui/webui/ntp/ntp_login_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 56 matching lines @@
 void NTPLoginHandler::HandleShowSyncLoginUI(const ListValue* args) {
   Profile* profile = Profile::FromWebUI(web_ui_);
   std::string username = profile->GetPrefs()->GetString(
       prefs::kGoogleServicesUsername);
 
   if (username.empty()) {
     // The user isn't signed in, show the sync promo.
     if (SyncPromoUI::ShouldShowSyncPromo(profile)) {
         web_ui_->tab_contents()->OpenURL(GURL(chrome::kChromeUISyncPromoURL),
                                          GURL(), CURRENT_TAB,
-                                         PageTransition::LINK);
+                                         content::PAGE_TRANSITION_LINK);
     }
   } else if (args->GetSize() == 4) {
     // The user is signed in, show the profiles menu.
     Browser* browser = GetBrowser();
     if (!browser)
       return;
     double x = 0;
     double y = 0;
     double width = 0;
     double height = 0;
@@ skipping 49 matching lines @@
 }
 
 Browser* NTPLoginHandler::GetBrowser() {
   for (TabContentsIterator it; !it.done(); ++it) {
     TabContents* tab = it->tab_contents();
     if (tab == web_ui_->tab_contents())
       return it.browser();
   }
   return NULL;
 }