Clearing registers and bits in the status register before returning to an untrusted code to avoid information leaks.
Clearing registers and bits in the status register before returning to an
untrusted code to avoid information leaks.

Review URL: http://codereview.chromium.org/174351

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@589 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client