[swarming] Isolate mac asan.

src/base.isolate

 # Copyright 2015 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'includes': [
     '../third_party/icu/icu.isolate',
     '../build/config/win/msvs_dependencies.isolate',
   ],
   'conditions': [
     ['use_custom_libcxx==1', {
@@ skipping 20 matching lines @@
     }],
     ['OS=="win" and component=="shared_library"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/icui18n.dll',
           '<(PRODUCT_DIR)/icuuc.dll',
           '<(PRODUCT_DIR)/v8.dll',
         ],
       },
     }],
+    ['OS=="mac" and asan==1', {
+      'variables': {
+        'files': [
+          '<(PRODUCT_DIR)/libclang_rt.asan_osx_dynamic.dylib',
+        ],
+      },
+    }],
     ['tsan==1', {
       'variables': {
         'files': [
           '../tools/sanitizers/tsan_suppressions.txt',
         ],
       },
     }],
     ['OS=="linux" and (asan==1 or cfi_vptr==1 or msan==1 or tsan==1)', {
       'variables': {
         'files': [
           # For llvm-symbolizer.
           '../third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6',
         ],
       },
     }],
     ['asan==1 or cfi_vptr==1 or msan==1 or tsan==1', {
       'variables': {
         'files': [
           '../third_party/llvm-build/Release+Asserts/bin/llvm-symbolizer<(EXECUTABLE_SUFFIX)',
         ],
       },
     }],
     # Workaround for https://code.google.com/p/swarming/issues/detail?id=211
     ['asan==0 or cfi_vptr==0 or msan==0 or tsan==0', {
       'variables': {},
     }],
   ],
-}
+}