Disallow packing or loading unpacked manifest v1 extensions.

chrome/browser/extensions/extension_browsertest.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 19 matching lines @@
     kFlagNone = 0,
 
     // Allow the extension to run in incognito mode.
     kFlagEnableIncognito = 1 << 0,
 
     // Allow file access for the extension.
     kFlagEnableFileAccess = 1 << 1,
 
     // Don't fail when the loaded manifest has warnings (should only be used
     // when testing deprecated features).
-    kFlagIgnoreManifestWarnings = 1 << 2
+    kFlagIgnoreManifestWarnings = 1 << 2,
+
+    // Allow older manifest versions (typically these can't be loaded - we allow
+    // them for testing).
+    kFlagAllowOldManifestVersions = 1 << 3,
   };
 
   ExtensionBrowserTest();
   virtual ~ExtensionBrowserTest();
 
   // InProcessBrowserTest
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE;
 
   const extensions::Extension* LoadExtension(const FilePath& path);
 
@@ skipping 190 matching lines @@
 
   // When waiting for visible page action count to change, we wait until it
   // reaches this value.
   int target_visible_page_action_count_;
 
   // Make the current channel "dev" for the duration of the test.
   extensions::Feature::ScopedCurrentChannel current_channel_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_