提供基本的ttl测试用例
 
 
dgrogan@chromium.org da79909507 sync with upstream @ 21409451 13 vuotta sitten
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doc.css reverting disastrous MOE commit, returning to r21 14 vuotta sitten
impl.html sync with upstream @ 21409451 13 vuotta sitten
index.html sync with upstream @ 21409451 13 vuotta sitten
log_format.txt reverting disastrous MOE commit, returning to r21 14 vuotta sitten
table_format.txt reverting disastrous MOE commit, returning to r21 14 vuotta sitten