Pass --tool=asan to run_tests.py on the ASan bot.

build/android/buildbot/buildbot_functions.sh

 #!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Bash functions used by buildbot annotator scripts for the android
 # build of chromium.  Executing this script should not perform actions
 # other than setting variables and defining of functions.
 
 # Number of jobs on the compile line; e.g.  make -j"${JOBS}"
@@ skipping 82 matching lines @@
   fi
 }
 
 # Used internally to buildbot_functions.sh.
 function _bb_android_run_tests () {
   local FLAGS
   FLAGS="--xvfb --verbose"
   if [[ ${BUILDTYPE} == Release ]]; then
     FLAGS="${FLAGS} --release"
   fi
-  build/android/run_tests.py ${FLAGS} "$@"
+  build/android/run_tests.py ${FLAGS} ${EXTRA_RUN_TESTS_FLAGS} "$@"
 }
 
 function bb_compile_setup {
   bb_setup_goma_internal
   # Should be called only after envsetup is done.
   gclient runhooks
 }
 
 # Setup goma.  Used internally to buildbot_functions.sh.
 function bb_setup_goma_internal {
@@ skipping 222 matching lines @@
   # Install application APK.
   bb_install_apk ${APK} ${APK_PACKAGE}
 
   # Run instrumentation tests. Using -I to install the test apk.
   echo "@@@BUILD_STEP Run instrumentation tests ${TEST_APK}@@@"
   FLAGS="-vvv"
   if [[ "${BUILDTYPE}" == Release ]]; then
     FLAGS="${FLAGS} --release"
   fi
   bb_run_step python build/android/run_instrumentation_tests.py \
-      ${FLAGS} --test-apk ${TEST_APK} -I --test_data ${TEST_DATA}
+      ${FLAGS} ${EXTRA_RUN_TESTS_FLAGS} --test-apk ${TEST_APK} -I \
+      --test_data ${TEST_DATA}
 }
 
 # Run instrumentation tests for all relevant APKs on device.
 function bb_run_instrumentation_tests {
   bb_run_all_instrumentation_tests_for_apk "ContentShell.apk" \
       "org.chromium.content_shell" "ContentShellTest" \
       "content:content/test/data/android/device_files"
   bb_run_all_instrumentation_tests_for_apk "ChromiumTestShell.apk" \
       "org.chromium.chrome.testshell" "ChromiumTestShellTest" \
       "chrome:chrome/test/data/android/device_files"
@@ skipping 74 matching lines @@
   )
 }
 
 # Retrieve a packed json property using python
 function bb_get_json_prop {
   local JSON="$1"
   local PROP="$2"
 
   python -c "import json; print json.loads('$JSON').get('$PROP', '')"
 }