Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/common/extension.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 "extensions/common/extension.h"
 
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 755 matching lines @@
       is_update(is_update),
       from_ephemeral(from_ephemeral),
       old_name(old_name) {}
 
 UnloadedExtensionInfo::UnloadedExtensionInfo(
     const Extension* extension,
     UnloadedExtensionInfo::Reason reason)
     : reason(reason),
       extension(extension) {}
 
+UninstalledExtensionInfo::UninstalledExtensionInfo(
+    const Extension* extension,
+    UninstalledExtensionInfo::Reason reason)
+    : reason(reason), extension(extension) {
+}
+
 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
     const Extension* extension,
     const PermissionSet* permissions,
     Reason reason)
     : reason(reason),
       extension(extension),
       permissions(permissions) {}
 
 }   // namespace extensions