Revert 281999 "Revert 281831 "Fix nacl_integration to run 32bit ..."

Revert 281999 "Revert 281831 "Fix nacl_integration to run 32bit ..."

> Revert 281831 "Fix nacl_integration to run 32bit tests with 32bi..."
> 
> > Fix nacl_integration to run 32bit tests with 32bit userland and 64bit kernel.
> > 
> > detect_host_arch.py already knows how to figure this out, so reuse it.
> > (It could probably be used in the darwin and maybe even in the windows
> > branch too.)
> > 
> > BUG=368384
> > TEST=nacl_integration on http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%282%29%2832%29/ goes green
> > TBR=mseaborn@chromium.org
> > 
> > Review URL: https://codereview.chromium.org/373253002
> 
> Suspect this is causing the failure http://build.chromium.org/p/chromium.win/builders/NaCl%20Tests%20%28x86-64%29/builds/13394
> 
> TBR=thakis@chromium.org
> 
> Review URL: https://codereview.chromium.org/374383002

Reverting the revert since it doesn't seem to cause the problem

TBR=kaliamoorthi@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=282008

[kaliamoorthi, 2014-07-09 12:06:23]

Committed patchset #1 manually as r282008 (tree was closed).