LookaheadFilterInterpreter: copy outgoing hardware states.

Since the Interpreter API allows interpreters to edit incoming
hardware states (which they do), the lookahead interpreter should make
a copy of outgoing hardware states, since it likes to look at previous
input states.

BUG=chromium-os:22994
TEST=unittests; tested on device

Change-Id: Ice8673729b08f26f1641abd0a489ddac0228976a
2 files changed
tree: 8a9d89fcd5fe0669a34ad9b112af146573be9d34
  1. include/
  2. src/
  3. tools/
  4. .gitignore
  5. LICENSE
  6. Makefile