Added NVALGRIND define [on by default]. Can be turned off on valgrind slaves ...

tools/buildbot/master.chromium/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2006-2008 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.
 
 # This is the buildmaster config file for the 'chromium' bot. It must
 # be installed as 'master.cfg' in your buildmaster's base directory
 # (although the filename can be changed with the --basedir option to
@@ skipping 555 matching lines @@
                                tests=['page_cycler', 'startup', 'dom_perf',
                                       'tab_switching', 'memory', 'sunspider',
                                       'v8_benchmark', 'page_cycler_http'],
                                factory_properties={
                                    'show_perf_results': True,
                                    'perf_id': 'chromium-rel-linux-hardy'})
 
 f_sub_dbg_linux = m_sub_linux.SubmoduleFactory('sub-dbg-linux', target='Debug')
 
 # On linux valgrind bots, override a few build settings.
-linux_valgrind_gyp_defines = 'release_optimize=1 werror= release_extra_cflags="-g"'
+linux_valgrind_gyp_defines = ('release_valgrind_build=1 '
+                              'release_optimize=1 werror= '
+                              'release_extra_cflags="-g"')
 
 f_chromium_rel_linux_valgrind_ui = F_LINUX(
     'chromium-rel-linux-valgrind-ui', target='Release',
     tests=['valgrind_ui_1_of_3'],
     factory_properties={
         'gclient_env': { 'GYP_DEFINES' : linux_valgrind_gyp_defines}})
 
 f_chromium_rel_linux_valgrind_ui_2 = F_LINUX(
     'chromium-rel-linux-valgrind-ui-2', target='Release',
     tests=['valgrind_ui_2_of_3'],
@@ skipping 162 matching lines @@
         'gclient_env': { 'GYP_DEFINES':'chromeos=1 branding=Chrome'}})
 
 f_sub_rel_mac = m_sub_mac.SubmoduleFactory('sub-rel-mac')
 f_sub_dbg_mac = m_sub_mac.SubmoduleFactory('sub-dbg-mac', target='Debug')
 
 
 # Mac Valgrind bots generally map the Windows Purify ones for layout/naming
 
 # On Mac valgrind bots, override the optimizer settings so we don't inline too
 # much and make the stacks harder to figure out.
-mac_valgrind_gyp_defines = 'mac_release_optimization=1'
+mac_valgrind_gyp_defines = ('release_valgrind_build=1 '
+                            'mac_release_optimization=1')
 
 # TODO(tvl): it would be nice to better tweak what is built by this to speed
 # up the compile cycle times.
 # TODO(tvl): there is a purify modules we could move a small subsest of these
 # too if we had a free machine.
 f_cr_rel_mac_valgrind = F_MAC(
     'chromium-rel-mac-valgrind',
     factory_properties={
         'gclient_env': {'GYP_DEFINES' : mac_valgrind_gyp_defines} },
     tests=['valgrind_app',
@@ skipping 824 matching lines @@
 c['projectURL'] = config.Master.project_url
 
 # the 'buildbotURL' string should point to the location where the buildbot's
 # internal web server (usually the html.Waterfall page) is visible. This
 # typically uses the port number set in the Waterfall 'status' entry, but
 # with an externally-visible host name which the buildbot cannot figure out
 # without some help.
 
 c['buildbotURL'] = 'http://build.chromium.org/buildbot/waterfall/'