am 27123468: Use a simple replacement for String8 that allocates its storage...

am 27123468: Use a simple replacement for String8 that allocates its storage beforehand to avoid reentering the heap while we\'re examining it (leak checker).

Merge commit '27123468b33cb61a1600079d583302b1b078b2ee' into eclair-mr2-plus-aosp

* commit '27123468b33cb61a1600079d583302b1b078b2ee':
  Use a simple replacement for String8 that allocates its storage beforehand to avoid reentering the heap while we're examining it (leak checker).