Rename extension_manifest_keys namespace to extensions::manifest_keys.

chrome/common/extensions/background_info.cc

 // Copyright (c) 2013 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/common/extensions/background_info.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/permissions/api_permission_set.h"
 #include "chrome/common/extensions/permissions/permissions_data.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/error_utils.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::DictionaryValue;
-namespace keys = extension_manifest_keys;
+namespace keys = extensions::manifest_keys;
 namespace values = extension_manifest_values;
 namespace errors = extension_manifest_errors;
 
 namespace extensions {
 
 namespace {
 
 const char kBackground[] = "background";
 
 static base::LazyInstance<BackgroundInfo> g_empty_background_info =
@@ skipping 274 matching lines @@
     keys::kBackgroundPageLegacy,
     keys::kBackgroundPersistent,
     keys::kBackgroundScripts,
     keys::kPlatformAppBackgroundPage,
     keys::kPlatformAppBackgroundScripts
   };
   return std::vector<std::string>(keys, keys + arraysize(keys));
 }
 
 }  // namespace extensions