Change the optimization settings from O1 to Os for the Mac Valgrind bots....

scripts/master/factory/chromium_factory.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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.
 
 """Utility class to build the chromium master BuildFactory's.
 
 Based on gclient_factory.py and adds chromium-specific steps."""
 
 from buildbot.steps import trigger
 
 from build_factory import BuildFactory
 import chromium_commands
 import chromium_config as config
 import gclient_factory
 
 
 class ChromiumFactory(gclient_factory.GClientFactory):
   """Encapsulates data and methods common to the chromium master.cfg files."""
 
   DEFAULT_TARGET_PLATFORM = config.Master.default_platform
 
   # On valgrind bots, override the optimizer settings so we don't inline too
   # much and make the stacks harder to figure out. Use the same settings
   # on all buildbot masters to make it easier to move bots.
   MEMORY_TOOLS_GYP_DEFINES = (
     # gcc flags
-    'mac_debug_optimization=1 '
-    'mac_release_optimization=1 '
+    'mac_debug_optimization=s '
+    'mac_release_optimization=s '
     'release_optimize=1 '
     'no_gc_sections=1 '
     'debug_extra_cflags="-g -fno-inline -fno-omit-frame-pointer -fno-builtin" '
     'release_extra_cflags="-g -fno-inline -fno-omit-frame-pointer '
                           '-fno-builtin" '
 
     # MSVS flags
     'win_debug_Optimization=1 '
     'win_debug_RuntimeChecks=0 '
     'win_debug_InlineFunctionExpansion=0 '
@@ skipping 409 matching lines @@
   def CEFFactory(self, identifier, target='Release', clobber=False,
                  tests=None, mode=None, slave_type='BuilderTester',
                  options=None, compile_timeout=1200, build_url=None,
                  project=None, factory_properties=None):
     self._solutions.append(gclient_factory.GClientSolution(
         'http://chromiumembedded.googlecode.com/svn/trunk',
         'src/cef'))
     return self.ChromiumFactory(identifier, target, clobber, tests, mode,
                                 slave_type, options, compile_timeout,
                                 build_url, project, factory_properties)