Change extension unload notification to indicate updates....

chrome/common/extensions/extension.h

 // Copyright (c) 2010 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_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 716 matching lines @@
 struct UninstalledExtensionInfo {
   explicit UninstalledExtensionInfo(const Extension& extension);
   ~UninstalledExtensionInfo();
 
   std::string extension_id;
   std::set<std::string> extension_api_permissions;
   Extension::Type extension_type;
   GURL update_url;
 };
 
+struct UnloadedExtensionInfo {
+  enum Reason {
+    DISABLE,    // The extension is being disabled.
+    UPDATE,     // The extension is being updated to a newer version.
+    UNINSTALL,  // The extension is being uninstalled.
+  };
+
+  Reason reason;
+
+  // Was the extension already disabled?
+  bool already_disabled;
+
+  // The extension being unloaded - this should always be non-NULL.
+  const Extension* extension;
+
+  UnloadedExtensionInfo(const Extension* extension, Reason reason);
+};
+
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_