Initialize AppListItem::has_shadow_ to avoid uninitialized reads.

BUG=338739
R=koz@chromium.org
TEST=unit_tests:AppListModelPicklerUnitTest.OneItem

Review URL: https://codereview.chromium.org/132743006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247620 0039d316-1c4b-4281-b951-d872f2087c98

ui/app_list/app_list_item.cc

@@ -11,6 +11,7 @@ namespace app_list {
 
 AppListItem::AppListItem(const std::string& id)
     : id_(id),
+      has_shadow_(false),
       highlighted_(false),
       is_installing_(false),
       percent_downloaded_(-1) {