Fix crash in bundle install dialog.

chrome/browser/extensions/extension_install_prompt.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/extension_install_prompt.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 452 matching lines @@
 
 void ExtensionInstallPrompt::OnMintTokenFailure(
     const GoogleServiceAuthError& error) {
   ShowConfirmation();
 }
 
 void ExtensionInstallPrompt::ShowConfirmation() {
   prompt_.set_type(prompt_type_);
 
   if (permissions_) {
-    prompt_.SetPermissions(
-        permissions_->GetWarningMessages(extension_->GetType()));
+    Extension::Type extension_type = prompt_type_ == BUNDLE_INSTALL_PROMPT ?
+        Extension::TYPE_UNKNOWN : extension_->GetType();
+    prompt_.SetPermissions(permissions_->GetWarningMessages(extension_type));
   }
 
   switch (prompt_type_) {
     case PERMISSIONS_PROMPT:
     case RE_ENABLE_PROMPT:
     case INLINE_INSTALL_PROMPT:
     case INSTALL_PROMPT: {
       prompt_.set_extension(extension_);
       prompt_.set_icon(gfx::Image(icon_));
       ShowExtensionInstallDialog(parent_, navigator_, delegate_, prompt_);
@@ skipping 22 matching lines @@
     Browser* browser) {
   // |browser| can be NULL in unit tests.
   if (!browser)
     return new ExtensionInstallPrompt(NULL, NULL, NULL);
   gfx::NativeWindow parent =
       browser->window() ? browser->window()->GetNativeWindow() : NULL;
   return new ExtensionInstallPrompt(parent, browser, browser->profile());
 }
 
 }  // namespace chrome