tree bab254947dd02045db140fab9eac4c08fec1b53b
parent 5b8c793f7881aa47bc898fc0e24169ebd36c02c7
author Shawn O. Pearce <sop@google.com> 1235851035 -0800
committer Shawn O. Pearce <sop@google.com> 1235851035 -0800

Add methods to test if a SafeHtmlBuilder is empty

Some application code may need to know if there is already data
in a SafeHtmlBuilder, as that may drive a decision to add some
sort of combiner string like ", " before putting more data into
the builder's buffer.

Signed-off-by: Shawn O. Pearce <sop@google.com>