NaCl: Move all browser tests into nacl_irt_test_env

IRT-using nexes are normally built in nacl_irt_test_env, not nacl_env.
All of chrome_browser_tests uses the IRT, so changing these tests to
use nacl_irt_test_env brings chrome_browser_tests into line with the
rest of the NaCl Scons build.

This will let us fix libimc_syscalls to call GC hooks without breaking
linking the nexes in chrome_browser_tests (since some tests there use
libimc_syscalls).

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3253
TEST=nacl_integration + count tests to check we haven't lost any

Review URL: https://codereview.chromium.org/11613012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176224 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed