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

chrome/browser/extensions/extension_webstore_private_api.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/extensions/extension_webstore_private_api.h"
 
 #include <string>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 353 matching lines @@
   GURL install_url(extension_urls::GetWebstoreInstallUrl(
       id, g_browser_process->GetApplicationLocale()));
 
   // The download url for the given |id| is now contained in |url|. We
   // navigate the current (calling) tab to this url which will result in a
   // download starting. Once completed it will go through the normal extension
   // install flow. The above call to SetWhitelistedInstallId will bypass the
   // normal permissions install dialog.
   NavigationController& controller =
       dispatcher()->delegate()->GetAssociatedTabContents()->controller();
-  controller.LoadURL(install_url, source_url(), PageTransition::LINK,
+  controller.LoadURL(install_url, source_url(), content::PAGE_TRANSITION_LINK,
                      std::string());
 
   return true;
 }
 
 bool GetBrowserLoginFunction::RunImpl() {
   if (!IsWebStoreURL(profile_, source_url()))
     return false;
   result_.reset(CreateLoginResult(profile_->GetOriginalProfile()));
   return true;
@@ skipping 16 matching lines @@
 bool SetStoreLoginFunction::RunImpl() {
   if (!IsWebStoreURL(profile_, source_url()))
     return false;
   std::string login;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &login));
   ExtensionService* service = profile_->GetExtensionService();
   ExtensionPrefs* prefs = service->extension_prefs();
   prefs->SetWebStoreLogin(login);
   return true;
 }