Fix a crashing call to GURL::spec() in downloads_api.cc:DownloadItemToJSON()
The actual bug is DownloadItemImpl::GetOriginalUrl(): the front() of an empty vector is not a good GURL reference!
The sprinkling of GURL::is_valid() is just to make me feel better.
There is still the open question of what happened to the downloads_url_chain records, but that is less urgent than stopping the crashes.
BUG=190096
Review URL: https://codereview.chromium.org/12607011
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@188602 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed
