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)
@@ -26,12 +26,15 @@
 
             # Whether or not we are building the Ash shell.
             'use_ash%': 0,
+            'asan_sentinel%': 0,
           },
           # Copy conditionally-set variables out one scope.
           'chromeos%': '<(chromeos)',
           'use_aura%': '<(use_aura)',
           'use_ash%': '<(use_ash)',
 
+          'asan_sentinel%': '<(asan_sentinel)',
+
           # Whether we are using Views Toolkit
           'toolkit_views%': 0,
 
@@ -97,6 +100,7 @@
         'enable_touch_ui%': '<(enable_touch_ui)',
         'buildtype%': '<(buildtype)',
         'host_arch%': '<(host_arch)',
+        'asan_sentinel%': '<(asan_sentinel)',
 
         # Default architecture we're building for is the architecture we're
         # building on.
@@ -662,6 +666,7 @@
       'google_api_key%': '',
       'google_default_client_id%': '',
       'google_default_client_secret%': '',
+      'asan_sentinel%': '<(asan_sentinel)',
     },
 
     # Copy conditionally-set variables out one scope.
@@ -755,6 +760,7 @@
     'google_default_client_id%': '<(google_default_client_id)',
     'google_default_client_secret%': '<(google_default_client_secret)',
     'enable_managed_users%': '<(enable_managed_users)',
+    'asan_sentinel%': '<(asan_sentinel)',
 
     # Use system mesa instead of bundled one.
     'use_system_mesa%': 0,
@@ -1621,6 +1627,7 @@
       ],
 
       'conditions': [
+
         ['OS=="win" and component=="shared_library"', {
           # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
           'win_release_RuntimeLibrary%': '2', # 2 = /MD (nondebug DLL)
@@ -1642,6 +1649,11 @@
       ],
     },
     'conditions': [
+      ['1==1 and asan_sentinel==0', {
+        'dependencies': [
+          '<(DEPTH)/build/asan.gyp:asan_dynamic_runtime',
+        ],
+      }],
       ['OS=="linux" and linux_use_tcmalloc==1 and clang_type_profiler==1', {
         'cflags_cc!': ['-fno-rtti'],
         'cflags_cc+': [
@@ -2400,6 +2412,7 @@
     },
   },
   'conditions': [
+
     ['os_posix==1', {
       'target_defaults': {
         'ldflags': [
@@ -4039,4 +4052,5 @@
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
+
 }