Non-SFI NaCl: Fix browser_tests based on libc_free.c

chrome/test/data/nacl/nacl_test_data.gyp

Index: chrome/test/data/nacl/nacl_test_data.gyp
diff --git a/chrome/test/data/nacl/nacl_test_data.gyp b/chrome/test/data/nacl/nacl_test_data.gyp
index ea5e198cde0f3a5b8971e9d2d0648e2fef286092..71949d1d7b776405776bf44cedc1d27ce79918ca 100644
--- a/chrome/test/data/nacl/nacl_test_data.gyp
+++ b/chrome/test/data/nacl/nacl_test_data.gyp
@@ -1139,6 +1139,11 @@
 
             # Stack-Smashing protector does not work with libc-free context.
             '-fno-stack-protector',
+            # Optimizers may translate the original code to code which

[hamaji, 2014/07/11 07:46:16]

Sorry, the previous patch was not sufficient for release build. I didn't notice
this yesterday because trybots were not working.

+            # requires builtin functions and/or relocations. Actually,

[Mark Seaborn, 2014/07/11 16:27:24]

Nit: 'Actually' -> 'Specifically', perhaps?

[hamaji, 2014/07/11 18:34:36]

Done.

+            # the LLVM's optimizer translates for-loop based zero
+            # clear to memset.
+            '-O0',
           ],
           'cflags!': [
             # We filter these out because release_extra_cflags or another
@@ -1148,10 +1153,14 @@
             '-fstack-protector-all',
             '-fprofile-generate',
             '-finstrument-functions',
+            '-O2',
           ],
           'ldflags': [
             '-nostdlib',
             '-shared',
+            # This binary cannot relocate itself, so we should have no
+            # undefined references left.
+            '-Wl,--no-undefined',
           ],
           'ldflags!': [
             # Explicitly remove the -pthread flag to avoid a link time warning.