Rename extension_manifest_keys namespace to extensions::manifest_keys.

chrome/common/extensions/manifest_handlers/icons_handler.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/manifest_handlers/icons_handler.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 "base/values.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/manifest_handler_helpers.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/size.h"
 
-namespace keys = extension_manifest_keys;
+namespace extensions {
 
-namespace extensions {
+namespace keys = manifest_keys;
 
 static base::LazyInstance<ExtensionIconSet> g_empty_icon_set =
     LAZY_INSTANCE_INITIALIZER;
 
 const int IconsInfo::kPageActionIconMaxSize = 19;
 const int IconsInfo::kBrowserActionIconMaxSize = 19;
 
 // static
 const ExtensionIconSet& IconsInfo::GetIcons(const Extension* extension) {
   IconsInfo* info = static_cast<IconsInfo*>(
@@ skipping 65 matching lines @@
       extension,
       IDS_EXTENSION_LOAD_ICON_FAILED,
       error);
 }
 
 const std::vector<std::string> IconsHandler::Keys() const {
   return SingleKey(keys::kIcons);
 }
 
 }  // namespace extensions