+ drop the blob hash, the updated reference will be updated in the commit message BUG=b/29583578 Change-Id: Ifabbe52a2f07ac29e1881f5c8a62d7f3eb3c2c04
With correction of a type of a thread function for new threading codes. Change-Id: Ic6dc9f530698800d1cfe2da327848e8f8b62e31f
Change the dir name to include more util tools. Change-Id: Id5b16062803ce5eed872fe2edb36d7e56b32eed8