Add a switch for using PNaCl Subzero and use it for -O0 translation.

components/nacl/browser/pnacl_host_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/nacl/browser/pnacl_host.h"
 
 #include <stdio.h>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 97 matching lines @@
   content::TestBrowserThreadBundle thread_bundle_;
   base::ScopedTempDir temp_dir_;
 };
 
 static nacl::PnaclCacheInfo GetTestCacheInfo() {
   nacl::PnaclCacheInfo info;
   info.pexe_url = GURL("http://www.google.com");
   info.abi_version = 0;
   info.opt_level = 0;
   info.has_no_store_header = false;
+  info.use_subzero = false;
   return info;
 }
 
 #define GET_NEXE_FD(renderer, instance, incognito, info, expect_hit) \
   do {                                                               \
     SCOPED_TRACE("");                                                \
     host_->GetNexeFd(                                                \
         renderer,                                                    \
         0, /* ignore render_view_id for now */                       \
         instance,                                                    \
@@ skipping 322 matching lines @@
   // Since there's no easy way to pump message queues one message at a time, we
   // have to simulate what would happen if 1 DeInitIfsafe task gets queued, then
   // a GetNexeFd gets queued, and then another DeInitIfSafe gets queued before
   // the first one runs. We can just shortcut and call DeInitIfSafe while the
   // cache is still initializing.
   DeInit();
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace pnacl