Add android_webview_unittests to the FYI android 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"${JOBS}"
@@ skipping 233 matching lines @@
       --builder-name "$BUILDERNAME" \
       --build-number "$BUILDNUMBER" \
       --master-name "$MASTERNAME" \
       --build-name "$BUILDERNAME" \
       --platform=chromium-android \
       --test-results-server "$RESULTSERVER"
 }
 
 # Run experimental unittest bundles.
 function bb_run_experimental_unit_tests {
-  # This build step was added because bash does not allow empty functions.
-  # run_tests.py echoes a build step, comment/remove this build step when you
-  # add tests to the experimental step.
-  echo '@@@BUILD_STEP experimental_unit_tests@@@'
+  build/android/run_tests.py --xvfb --verbose -s android_webview_unittests
 }
 
 # Run findbugs.
 function bb_run_findbugs_diff {
   echo "@@@BUILD_STEP findbugs_diff@@@"
   build/android/findbugs_diff.py
 }
 
 # Run findbugs plugin tests.
 function bb_run_findbugs_plugin_tests {
@@ skipping 108 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', '')"
 }