Make chrome_browser_tests work with irt=0 again

tests/srpc/nacl.scons

Index: tests/srpc/nacl.scons
diff --git a/tests/srpc/nacl.scons b/tests/srpc/nacl.scons
index d05bf889cb39b34cb017bbf03c54389277e73fc2..56a226833d11f5a36ed8f3e59ae5b4c02cf11514 100644
--- a/tests/srpc/nacl.scons
+++ b/tests/srpc/nacl.scons
@@ -20,7 +20,7 @@ srpc_test_nexe = env.ComponentProgram(
     srpc_test_nexe_name, srpc_test_objs,
     EXTRA_LIBS=srpc_test_libs + [
         '${NON_PPAPI_BROWSER_LIBS}',
-        'pthread'])
+        '${PTHREAD_LIBS}'])
 env.Publish(srpc_test_nexe_name, 'run',
     ['srpc_basic.html',
      'srpc_perf.html',
@@ -42,7 +42,7 @@ srpc_nrd_server_nexe = env.ComponentProgram(
         'platform',
         'gio',
         'm',
-        'pthread'])
+        '${PTHREAD_LIBS}'])
 env.Publish(srpc_nrd_server_nexe_name, 'run',
     ['srpc_nrd_server.nmf'])
 
@@ -58,7 +58,7 @@ srpc_nrd_client_nexe = env.ComponentProgram(
         'platform',
         'gio',
         'm',
-        'pthread'])
+        '${PTHREAD_LIBS}'])
 env.Publish(srpc_nrd_client_nexe_name, 'run',
     ['srpc_nrd_xfer.html',
      'srpc_nrd_client.nmf',
@@ -70,7 +70,7 @@ cat_nexe_name = ('cat_%s' % env.get('TARGET_FULLARCH'))
 cat_nexe = env.ComponentProgram(
     cat_nexe_name, 'cat.c',
     EXTRA_LIBS=['${NON_PPAPI_BROWSER_LIBS}',
-                'srpc', 'imc_syscalls', 'platform', 'gio', 'pthread'])
+                'srpc', 'imc_syscalls', 'platform', 'gio', '${PTHREAD_LIBS}'])
 env.Publish(cat_nexe_name, 'run',
     ['srpc_url_as_nacl_desc.html',
      'srpc_url_as_nacl_desc_success.html',