Add ContentShell tests to dartium android builder.

tools/bots/run_android_tests.sh

+#!/bin/bash
+# Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# This script is meant to be run inside the src directory of a Dartium
+# (or Chromium) checkout, with android_tools installed in third_party.
+# It expects ContentShell to have been build for ARM android, using the
+# ninja build system.
+# It expects a single android device to be connected by USB to the machine.
+set -v
+set -x
+cd src
+ninja -C out/Release forwarder2
+ninja -C out/Release pkg_packages
+cp -R out/Release/packages out/ReleaseARM/packages
+export PATH=$PATH:third_party/android_tools/sdk/platform-tools/\
+:third_party/android_tools/sdk/tools/
+
+adb uninstall org.chromium.content_shell_apk
+adb install -r $1
+./build/android/adb_reverse_forwarder.py 8081 8081 8082 8082 \
+                                         8083 8083 8084 8084 &
+FORWARDER_PID = $!
+sleep 15
+./dart/tools/test.py -m release -a arm --progress=line --report --time \
+    --failure-summary --write-debug-log --local_ip=localhost \
+    --test_server_port=8083 --test_server_cross_origin_port=8084 \
+    --test_driver_port=8081 --test_driver_error_port=8082 \
+    -r ContentShellOnAndroid
+EXIT_CODE=$?
+kill -9 $FORWARDER_PID
+exit $EXIT_CODE