Fix crash in bundle install dialog.

r149688 added a check for the extension type in
ExtensionInstallPrompt::ShowConfirmation, but for bundle installs we don't have
an Extension instance to get the type of.

BUG=141451
[email protected]

Review URL: https://chromiumcodereview.appspot.com/10823243

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150724 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed