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

chrome/test/nacl/nacl_browsertest.cc

Index: chrome/test/nacl/nacl_browsertest.cc
diff --git a/chrome/test/nacl/nacl_browsertest.cc b/chrome/test/nacl/nacl_browsertest.cc
index bfacf17e206eb55b865b748efb3befe6ed9cb220..35c43de63e81116328fca73982d4c8820b60a94b 100644
--- a/chrome/test/nacl/nacl_browsertest.cc
+++ b/chrome/test/nacl/nacl_browsertest.cc
@@ -142,11 +142,11 @@ NACL_BROWSER_TEST_F(NaClBrowserTest, MAYBE_CrashViaCheckFailure, {
 })
 
 NACL_BROWSER_TEST_F(NaClBrowserTest, MAYBE_CrashViaExitCall, {
-  RunNaClIntegrationTest( FILE_PATH_LITERAL("ppapi_crash_via_exit_call.html"));
+  RunNaClIntegrationTest(FILE_PATH_LITERAL("ppapi_crash_via_exit_call.html"));
 })
 
 NACL_BROWSER_TEST_F(NaClBrowserTest, MAYBE_CrashInCallback, {
-  RunNaClIntegrationTest( FILE_PATH_LITERAL("ppapi_crash_in_callback.html"));
+  RunNaClIntegrationTest(FILE_PATH_LITERAL("ppapi_crash_in_callback.html"));
 })
 
 NACL_BROWSER_TEST_F(NaClBrowserTest, MAYBE_CrashOffMainThread, {
@@ -386,6 +386,13 @@ IN_PROC_BROWSER_TEST_F(NaClBrowserTestPnacl,
   RunLoadTest(FILE_PATH_LITERAL("pnacl_options.html?use_nmf=o_0"));
 }
 
+// Test Subzero. Subzero is triggered by the O0 option so reuse that test
+// pexe and test harness.
+IN_PROC_BROWSER_TEST_F(NaClBrowserTestPnaclSubzero,
+                       MAYBE_PNACL(PnaclNMFOptionsO0)) {
+  RunLoadTest(FILE_PATH_LITERAL("pnacl_options.html?use_nmf=o_0"));
+}
+
 IN_PROC_BROWSER_TEST_F(NaClBrowserTestPnacl,
                        MAYBE_PNACL(PnaclNMFOptionsO2)) {
   RunLoadTest(FILE_PATH_LITERAL("pnacl_options.html?use_nmf=o_2"));