GoogleURLTrackerInfoBarDelegate: Initialize uninitialized member in constructor.

BUG=None
CID=115981

Review URL: https://codereview.chromium.org/302313006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274639 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/google/google_url_tracker_infobar_delegate.cc

@@ -72,6 +72,7 @@ GoogleURLTrackerInfoBarDelegate::GoogleURLTrackerInfoBarDelegate(
     const GURL& search_url)
     : ConfirmInfoBarDelegate(),
       google_url_tracker_(google_url_tracker),
+      navigation_helper_weak_ptr_(NULL),
       search_url_(search_url),
       pending_id_(0) {
 }