Update perf_expectations for the 32-bit version of nacl_helper.
Update perf_expectations for the 32-bit version of nacl_helper.

This CL was supposed to fix the problem, but the 32 and 64-bit expectations
were stored seperately:
https://chromiumcodereview.appspot.com/9866019/

BUG= http://code.google.com/p/chromium/issues/detail?id=120350
TEST= none

Review URL: https://chromiumcodereview.appspot.com/9863024

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@129145 0039d316-1c4b-4281-b951-d872f2087c98

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