Don't load webstore component for guest session

chrome/browser/extensions/component_loader.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/extensions/component_loader.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 430 matching lines @@
 #endif
 }
 
 void ComponentLoader::AddKeyboardApp() {
 #if defined(OS_CHROMEOS)
   Add(IDR_KEYBOARD_MANIFEST, base::FilePath(FILE_PATH_LITERAL("keyboard")));
 #endif
 }
 
 void ComponentLoader::AddWebStoreApp() {
+#if defined(OS_CHROMEOS)
+  if (!IsNormalSession())
+    return;
+#endif
+
   AddWithNameAndDescription(IDR_WEBSTORE_MANIFEST,
                             base::FilePath(FILE_PATH_LITERAL("web_store")),
                             IDS_WEBSTORE_NAME_STORE,
                             IDS_WEBSTORE_APP_DESCRIPTION);
 }
 
 // static
 void ComponentLoader::EnableBackgroundExtensionsForTesting() {
   enable_background_extensions_during_testing = true;
 }
@@ skipping 211 matching lines @@
         off_the_record_context, Extension::GetBaseURLFromExtensionId(id));
     storage::FileSystemContext* file_system_context =
         content::BrowserContext::GetStoragePartitionForSite(
             off_the_record_context, site)->GetFileSystemContext();
     file_system_context->EnableTemporaryFileSystemInIncognito();
   }
 #endif
 }
 
 }  // namespace extensions