Change _ITERATOR_DEBUG_LEVEL to 1 on Release builds

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 769d26c0d30ea1a9a2d4fcf50a60fbdf7dcb7575..e66cead106c90a57a828e39cb1248c32233d12cc 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -2676,6 +2676,13 @@
                 # "/Oy /Oy-" and warnings about overriding.
                 'AdditionalOptions': ['/Oy-'],
               }],
+              ['win_debug_disable_iterator_debugging!=1', {

[scottmg, 2013/09/18 19:03:49]

is this used elsewhere? it really shouldn't be called win_"debug" if it's
affecting the release config.

[Will Harris, 2013/09/19 09:40:57]

added a new win_release_disable_iterator_debugging

it's not used anywhere else. it's just for the tsan/drmemory builds

+                # VS2010 changed default _ITERATOR_DEBUG_LEVEL to 0
+                # on Release builds so we change it back to 1 to restore these
+                # checks, except if explicitly disabled
+                # See http://crbug.com/289691
+                'PreprocessorDefinitions': ['_ITERATOR_DEBUG_LEVEL=1'],
+              }],
             ],
             'AdditionalOptions': [ '<@(win_release_extra_cflags)', ],
           },