Move Extension into extensions namespace

chrome/browser/policy/app_pack_updater.cc

 // Copyright (c) 2012 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/policy/app_pack_updater.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/location.h"
@@ skipping 260 matching lines @@
 
     if (EndsWith(basename, kCRXFileExtension, false /* case-sensitive */)) {
       size_t n = basename.find('-');
       if (n != std::string::npos && n + 1 < basename.size() - 4) {
         id = basename.substr(0, n);
         // Size of |version| = total size - "<id>" - "-" - ".crx"
         version = basename.substr(n + 1, basename.size() - 5 - id.size());
       }
     }
 
-    if (!Extension::IdIsValid(id)) {
+    if (!extensions::Extension::IdIsValid(id)) {
       LOG(ERROR) << "Bad AppPack extension id in cache: " << id;
       id.clear();
     } else if (!ContainsKey(*valid_ids, id)) {
       LOG(WARNING) << basename << " is in the cache but is not configured by "
                    << "the AppPack policy, and will be erased.";
       id.clear();
     }
 
     if (!Version(version).IsValid()) {
       LOG(ERROR) << "Bad AppPack extension version in cache: " << version;
@@ skipping 248 matching lines @@
 void AppPackUpdater::SetScreenSaverPath(const FilePath& path) {
   // Don't invoke the callback if the path isn't changing.
   if (path != screen_saver_path_) {
     screen_saver_path_ = path;
     if (!screen_saver_update_callback_.is_null())
       screen_saver_update_callback_.Run(screen_saver_path_);
   }
 }
 
 }  // namespace policy