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

 #!/usr/bin/python
 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import pyauto_nacl  # Must be imported before pyauto
 import pyauto
 import nacl_utils
 import random
 
 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',
            'ppapi_example_audio.html#mute',
            'ppapi_file_system.html',
            'ppapi_geturl.html',
            'ppapi_progress_events.html',
            # TODO(nfullagar): graphics 2d appears to lock up while waiting
            # for the replace contents flush callback. Enable this test when
            # we've figured out why this occurs and the problem is fixed.
            # 'ppapi_ppb_graphics2d.html',
            'srpc_basic.html',
            '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',
            'srpc_url_as_nacl_desc.html']
 
   def testLoadNexesInMultipleTabs(self):
     """Load nexes in multiple tabs and surf away from all of them."""
 
     # Prime each tab by navigating to about:version.
     # TODO(mcgrathr): Reduced from 10 to 5 because 256MB*10 is too
@@ skipping 45 matching lines @@
       nacl_utils.WaitForNexeLoad(self)
       nacl_utils.VerifyAllTestsPassed(self)
 
     # Go back one last time and make sure we ended up where we started.
     self.GetBrowserWindow(0).GetTab(0).GoBack()
     self.assertEqual(original_title, self.GetActiveTabTitle())
 
 
 if __name__ == '__main__':
   pyauto_nacl.Main()