_pyautolib.so is linked with libasan.a if ASAN is used.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 77e53aab7c3058a6893af66561713aff3db540da..0cf61a2ecaa2105febbbba41afb6bf36b757ac8e 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -15,6 +15,17 @@
       'test/automation/tab_proxy.cc',
       'test/automation/tab_proxy.h',
     ],
+    'pyautolib_libraries': [
+    ],
+    'conditions': [
+      ['asan==1', {
+        'pyautolib_libraries': [
+          # Link in the libasan32.a because this binary will be loaded by
+          # Python that does not have libasan in.
+          '-lasan32',
+        ]
+      }],
+    ],
   },
   'targets': [
     {
@@ -3666,6 +3677,9 @@
              '-Wno-uninitialized',
              '-Wno-self-assign',  # to keep clang happy for generated code.
           ],
+          'libraries': [
+            '<@(pyautolib_libraries)',
+          ],
           'sources': [
             'test/automation/proxy_launcher.cc',
             'test/automation/proxy_launcher.h',