Adapt Android buildbot.sh towards an Android trybot.

build/android/buildbot.sh

 #!/bin/bash
 # Copyright (c) 2011 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.
 #
 # "compile and run tests" script for the android build of chromium.
 # Intended for use by buildbot.
 # At this time, we only have one bot which is both a builder and
 # tester.  Script assumes it runs in the "build" directory.
 #
 # This script uses buildbot "Annotator" style for steps.
 # This script does not sync the source tree.
 
 set -e
 set -x
 
+# Options in this script.
+BUILD_EXPERIMENTAL_TARGETS=1
+RUN_TESTS=1
 NEED_CLOBBER=0
+JOBS=4   # make -j"${JOBS}"
+
+# If we are a trybot, disable experimental targets and tests.  We
+# eventually want tests on a trybot but emulator launch/restart is not
+# reliable enough yet.
+# TODO(jrg): when setting up a trybot, make sure to add TRYBOT=1 in
+# the environment.
+if [ "${TRYBOT:-0}" = 1 ] ; then
+  echo "Disabling experimental builds and tests since we are a trybot."
+  BUILD_EXPERIMENTAL_TARGETS=0
+  RUN_TESTS=0
+fi
 
 echo "@@@BUILD_STEP cd into source root@@@"
 SRC_ROOT=$(cd "$(dirname $0)/../.."; pwd)
 cd $SRC_ROOT
 
 echo "@@@BUILD_STEP Basic setup@@@"
 export ANDROID_SDK_ROOT=/usr/local/google/android-sdk-linux_x86
 export ANDROID_NDK_ROOT=/usr/local/google/android-ndk-r7
 for mandatory_directory in "${ANDROID_SDK_ROOT}" "${ANDROID_NDK_ROOT}" ; do
   if [[ ! -d "${mandatory_directory}" ]]; then
@@ skipping 14 matching lines @@
 
 if [ "$NEED_CLOBBER" -eq 1 ]; then
   echo "@@@BUILD_STEP Clobber@@@"
   rm -rf "${SRC_ROOT}"/out
 fi
 
 echo "@@@BUILD_STEP android_gyp@@@"
 android_gyp
 
 echo "@@@BUILD_STEP Compile@@@"
-make -j4
+make -j${JOBS}
 
-# Linking DumpRenderTree appears to hang forever?
-# EXPERIMENTAL_TARGETS="DumpRenderTree webkit_unit_tests"
-EXPERIMENTAL_TARGETS="webkit_unit_tests"
-for target in ${EXPERIMENTAL_TARGETS} ; do
-  echo "@@@BUILD_STEP Experimental Compile $target @@@"
-  set +e
-  make -j4 "${target}"
-  if [ $? -ne 0 ] ; then
-    echo "@@@STEP_WARNINGS@@@"
-  fi
-  set -e
-done
+if [ "${BUILD_EXPERIMENTAL_TARGETS}" = 1 ] ; then
+  # Linking DumpRenderTree appears to hang forever?
+  # EXPERIMENTAL_TARGETS="DumpRenderTree webkit_unit_tests"
+  EXPERIMENTAL_TARGETS="webkit_unit_tests"
+  for target in ${EXPERIMENTAL_TARGETS} ; do
+    echo "@@@BUILD_STEP Experimental Compile $target @@@"
+    set +e
+    make -j4 "${target}"
+    if [ $? -ne 0 ] ; then
+      echo "@@@STEP_WARNINGS@@@"
+    fi
+    set -e
+  done
+fi
 
-echo "@@@BUILD_STEP Run Tests@@@"
-build/android/run_tests.py -e --xvfb --verbose
+if [ "${RUN_TESTS}" = 1 ] ; then
+  echo "@@@BUILD_STEP Run Tests@@@"
+  build/android/run_tests.py -e --xvfb --verbose
+fi
 
 exit 0