Add a postbuild action for executables built with ASan on Mac OS.

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 180386)
+++ build/common.gypi	(working copy)
@@ -2400,6 +2400,12 @@
     },
   },
   'conditions': [
+    ['1==1', {

[Mark Mentovai, 2013/02/08 17:45:13]

You’re not actually in target_defaults here, so…

+        'dependencies': [

[Mark Mentovai, 2013/02/08 17:45:13]

…this 'dependencies' section gets included into the root of each .gyp file, not
into its 'target_defaults' section. 'dependencies' outside of a target has no
meaning. This should be in common.gypi’s

  target_defaults
    conditions
      condition 1==1 (or, eventually, your own asan condition)

or you can leave it here at the root and put it in its own target_defaults, as
in

  conditions
    condition 1==1 (or, eventually, your own asan condition)
      target_defaults

+          '<(DEPTH)/build/asan.gyp:asan_dynamic_runtime',
+        ],
+    }],
+
     ['os_posix==1', {
       'target_defaults': {
         'ldflags': [
@@ -4039,4 +4045,5 @@
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
+
 }