Added defense in depth mechanism to host resolver to prevent long hostnames from getting into glibc's getaddrinfo.

BUG=50383
TEST=HostResolverImplTest.LongHost
Review URL: http://codereview.chromium.org/3052044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55319 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed