Consistently use namespaced base::Version in extensions code.

chrome/browser/extensions/api/runtime/chrome_runtime_api_delegate.cc

 // Copyright 2014 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/api/runtime/chrome_runtime_api_delegate.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 319 matching lines @@
   if (!browser)
     return false;
   return extensions::ExtensionTabUtil::OpenOptionsPage(extension, browser);
 }
 
 void ChromeRuntimeAPIDelegate::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(extensions::NOTIFICATION_EXTENSION_UPDATE_FOUND, type);
-  using UpdateDetails = const std::pair<std::string, Version>;
+  using UpdateDetails = const std::pair<std::string, base::Version>;
   const std::string& id = content::Details<UpdateDetails>(details)->first;
-  const Version& version = content::Details<UpdateDetails>(details)->second;
+  const base::Version& version =
+      content::Details<UpdateDetails>(details)->second;
   if (version.IsValid()) {
     CallUpdateCallbacks(
         id, UpdateCheckResult(true, kUpdateFound, version.GetString()));
   }
 }
 
 void ChromeRuntimeAPIDelegate::OnExtensionInstalled(
     content::BrowserContext* browser_context,
     const Extension* extension,
     bool is_update) {
@@ skipping 33 matching lines @@
     const UpdateCheckResult& result) {
   auto it = update_check_info_.find(extension_id);
   if (it == update_check_info_.end())
     return;
   std::vector<UpdateCheckCallback> callbacks;
   it->second.callbacks.swap(callbacks);
   for (const auto& callback : callbacks) {
     callback.Run(result);
   }
 }