Get rid of the extension's "Current Version" file.

chrome/common/extensions/extension.h

 // Copyright (c) 2009 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_COMMON_EXTENSIONS_EXTENSION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 219 matching lines @@
   // the browser might load (like themes and page action icons).
   std::set<FilePath> GetBrowserImages();
 
   // Calculates and returns the permission class this extension is in.
   PermissionClass GetPermissionClass();
 
   // Returns an absolute path to the given icon inside of the extension. Returns
   // an empty FilePath if the extension does not have that icon.
   FilePath GetIconPath(Icons icon);
 
+  const DictionaryValue* manifest_value() const {
+    return manifest_value_.get();
+  }
+
   // Returns a list of all locales supported by the extension.
   const std::set<std::string>& supported_locales() const {
     return supported_locales_;
   }
   // Add locale to the list of supported locales.
   void AddSupportedLocale(const std::string& supported_locale) {
     supported_locales_.insert(supported_locale);
   }
 
   // Getter/setter for a default_locale_.
@@ skipping 106 matching lines @@
 
   // The sites this extension has permission to talk to (using XHR, etc).
   std::vector<URLPattern> host_permissions_;
 
   // The paths to the icons the extension contains mapped by their width.
   std::map<int, std::string> icons_;
 
   // URL for fetching an update manifest
   GURL update_url_;
 
-  // List of all locales extension supports.
+  // A copy of the manifest that this extension was created from.
+  scoped_ptr<DictionaryValue> manifest_value_;
+
+    // List of all locales extension supports.
   std::set<std::string> supported_locales_;
 
   // Default locale, used for fallback.
   std::string default_locale_;
 
   // Runtime data:
 
   // True if the background page is ready.
   bool background_page_ready_;
 
   FRIEND_TEST(ExtensionTest, LoadPageActionHelper);
 
   DISALLOW_COPY_AND_ASSIGN(Extension);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_