--trust-primitives: Remove bounds checks and receiver and argument type checks

The model is that if your program is tested and never
  - has a bounds error on a primitive array
  - tries to do arithmetic on null
then when compiled with --trust-primitive it will produce the same
answer, but with smaller and faster code.

R=floitsch@google.com

Review URL: https://codereview.chromium.org//703083002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@41682 260f80e4-7a28-3924-810f-c04153c831b5
6 files changed