Set up NaClChromeMainArgs number_of_cores member so apps can size threadpools appropriately

ppapi/native_client/tests/nacl_browser/sysconf_nprocessors/nacl.scons

+# -*- python -*-
+# Copyright (c) 2013 The Chromium 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 multiprocessing
+
+Import('env')
+
+sysconf_obj = env.ComponentObject('sysconf_nprocessors_onln_test.o',
+                                'sysconf_nprocessors_onln_test.cc')
+sysconf_nexe_name = env.ProgramNameForNmf('sysconf_nprocessors_onln_test')
+sysconf_nexe = env.ComponentProgram(sysconf_nexe_name,
+                                    sysconf_obj,
+                                    EXTRA_LIBS=['nacl_ppapi_util',
+                                                'ppapi_cpp',
+                                                'pthread',
+                                                'srpc',
+                                                'platform',
+                                                'gio',
+                                                'imc',
+                                                'imc_syscalls',
+                                                ])
+env.Publish(sysconf_nexe_name, 'run',
+            ['sysconf_nprocessors.html'])
+
+node = env.PPAPIBrowserTester(
+    'sysconf_nprocessors_onln_test.out',
+    url='sysconf_nprocessors.html',
+    nmf_names=['sysconf_nprocessors_onln_test'],
+    files=env.ExtractPublishedFiles(sysconf_nexe_name),
+    test_args=[('cpu_count',str(multiprocessing.cpu_count()))])
+
+env.AddNodeToTestSuite(node,
+                       ['chrome_browser_tests'],
+                       'run_sysconf_nprocessors_onln_test',
+                       is_broken=(env.PPAPIBrowserTesterIsBroken() or

[jvoung (off chromium), 2013/04/16 18:37:38]

Is it possible to frame this test within the NaClBrowserTest framework instead? 
See chrome/test/nacl/ for the driver + chrome/test/data/nacl/ and for setting up
the html + nexe/pexe compiles.

For example, the exit status test has been moved there.

We are trying to move things out of "nacl_integration", since the normal
"browser_test" infrastructure has better sharding and such.  We also stopped
testing PNaCl under nacl_integration, and only test via browser_test nowadays.

[bsy, 2013/04/17 15:05:37]

Done.

+                                  env.Bit('nacl_glibc')))