rewrite FindStringInBuffer to use an explicit loop instead of trying to wrap strstr which is just too inconvenient.  Make it use a StringRef to avoid ".c_str()" calls.
rewrite FindStringInBuffer to use an explicit loop instead of
trying to wrap strstr which is just too inconvenient.  Make it
use a StringRef to avoid ".c_str()" calls.



git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@79120 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx