Disable basic_object.html and srpc_nrd_xfer.html until we find out why they flake on Linux 32 bit.

tests/pyauto_nacl/multiple_nexes.py

Index: tests/pyauto_nacl/multiple_nexes.py
===================================================================
--- tests/pyauto_nacl/multiple_nexes.py	(revision 5437)
+++ tests/pyauto_nacl/multiple_nexes.py	(working copy)
@@ -10,7 +10,10 @@
 
 class NaClTest(pyauto.PyUITest):
   """Tests for NaCl."""
-  nexes = ['basic_object.html',
+  nexes = [# TODO(cstefansen): Figure out why multiple nexes in a page flakes
+           # on Linux 32 bit (issue 1851); then uncomment the following line
+           # (and similar line below)
+           # 'basic_object.html',
            'earth_c.html',
            'earth_cc.html',
            'ppapi_core.html',
@@ -26,7 +29,9 @@
            'srpc_hw.html',
            # TODO(nfullagar): enable this test when it works on trybots.
            # 'srpc_hw_fd.html',
-           'srpc_nrd_xfer.html',
+           # TODO(cstefansen): Figure out why multiple nexes in a page flakes
+           # on Linux 32 bit (issue 1851); then uncomment the following line.
+           # 'srpc_nrd_xfer.html',
            'srpc_plugin.html',
            'srpc_shm.html',
            'srpc_sockaddr.html',