Extend single-step test to record the size of instructions per syscall, in bytes
Extend single-step test to record the size of instructions per syscall, in bytes

This can be more meaningful than an instruction count, if you want to
get an idea of i-cache pressure.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3280
TEST=run_signal_handler_single_step_test

Review URL: https://codereview.chromium.org/12213025

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@10724 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client