apk-based test runner work for android. 2 unit test bundles converted over (ipc, base).

OFF by default; enable with a gyp var.  E.g.
  GYP_DEFINES="$GYP_DEFINES gtest_target_type=shared_library" android_gyp

Some useful commands:
adb uninstall org.chromium.native_test
adb install -r out/Release/base_unittests_apk/ChromeNativeTests-debug.apk
adb shell am start -n org.chromium.native_test/org.chromium.native_test.ChromeNativeTestActivity

For the moment, all apks can be built simultaneously but use the same
activity name.  Thus you cannot have more than one installed at the
same time.

BUG=None
TEST=


Review URL: http://codereview.chromium.org/10051021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133053 0039d316-1c4b-4281-b951-d872f2087c98

8 files changed, 645 insertions, 0 deletions

diff --git a/testing/android/AndroidManifest.xml b/testing/android/AndroidManifest.xml
new file mode 100644
index 0000000..de98aec
--- /dev/null
+++ b/testing/android/AndroidManifest.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="org.chromium.native_test"
+      android:versionCode="1"
+      android:versionName="1.0">
+
+    <uses-sdk android:minSdkVersion="15" />
+
+    <application android:label="ChromeNativeTests">
+        <activity android:name=".ChromeNativeTestActivity"
+                android:label="ChromeNativeTest"
+                android:configChanges="orientation|keyboardHidden">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+    <!-- TODO(jrg): add more permissions as needed by unit tests. -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
+
+</manifest> 
diff --git a/testing/android/OWNERS b/testing/android/OWNERS
new file mode 100644
index 0000000..da07f99
--- /dev/null
+++ b/testing/android/OWNERS
@@ -0,0 +1,3 @@
+bulach@chromium.org
+jrg@chromium.org
+
diff --git a/testing/android/generate_native_test.py b/testing/android/generate_native_test.py
new file mode 100755
index 0000000..7b7853d
--- /dev/null
+++ b/testing/android/generate_native_test.py
@@ -0,0 +1,194 @@
+#!/usr/bin/python
+# 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.
+
+# On Android we build unit test bundles as shared libraries.  To run
+# tests, we launch a special "test runner" apk which loads the library
+# then jumps into it.  Since java is required for many tests
+# (e.g. PathUtils.java), a "pure native" test bundle is inadequate.
+#
+# This script, generate_native_test.py, is used to generate the source
+# for an apk that wraps a unit test shared library bundle.  That
+# allows us to have a single boiler-plate application be used across
+# all unit test bundles.
+
+import logging
+import optparse
+import os
+import re
+import shutil
+import subprocess
+import sys
+
+
+class NativeTestApkGenerator(object):
+  """Generate a native test apk source tree.
+
+  TODO(jrg): develop this more so the activity name is replaced as
+  well.  That will allow multiple test runners to be installed at the
+  same time.  (The complication is that it involves renaming a java
+  class, which implies regeneration of a jni header, and on and on...)
+  """
+
+  # Files or directories we need to copy to create a complete apk test shell.
+  _SOURCE_FILES = ['AndroidManifest.xml',
+                   'native_test_apk.xml',
+                   'res',  # res/values/strings.xml
+                   'java', # .../ChromeNativeTestActivity.java
+                   ]
+
+  # Files in the destion directory that have a "replaceme" string
+  # which should be replaced by the basename of the shared library.
+  # Note we also update the filename if 'replaceme' is itself found in
+  # the filename.
+  _REPLACEME_FILES = ['AndroidManifest.xml',
+                      'native_test_apk.xml',
+                      'res/values/strings.xml']
+
+  def __init__(self, native_library, jars, output_directory):
+    self._native_library = native_library
+    self._jars = jars
+    self._output_directory = output_directory
+    self._root_name = None
+    if self._native_library:
+      self._root_name = self._LibraryRoot()
+    logging.warn('root name: %s' % self._root_name)
+
+
+  def _LibraryRoot(self):
+    """Return a root name for a shared library.
+
+    The root name should be suitable for substitution in apk files
+    like the manifest.  For example, blah/foo/libbase_unittests.so
+    becomes base_unittests.
+    """
+    rootfinder = re.match('.?lib(.+).so',
+                          os.path.basename(self._native_library))
+    if rootfinder:
+      return rootfinder.group(1)
+    else:
+      return None
+
+  def _CopyTemplateFiles(self):
+    """Copy files needed to build a new apk.
+
+    TODO(jrg): add more smarts so we don't change file timestamps if
+    the files don't change?
+    """
+    srcdir = os.path.dirname(os.path.realpath( __file__))
+    if not os.path.exists(self._output_directory):
+      os.makedirs(self._output_directory)
+    for f in self._SOURCE_FILES:
+      src = os.path.join(srcdir, f)
+      dest = os.path.join(self._output_directory, f)
+      if os.path.isfile(src):
+        if os.path.exists(dest):
+          os.remove(dest)
+        logging.warn('%s --> %s' % (src, dest))
+        shutil.copyfile(src, dest)
+      else:  # directory
+        if os.path.exists(dest):
+          # One more sanity check since we're deleting a directory...
+          if not '/out/' in dest:
+            raise Exception('Unbelievable output directory; bailing for safety')
+          shutil.rmtree(dest)
+        logging.warn('%s --> %s' % (src, dest))
+        shutil.copytree(src, dest)
+
+  def _ReplaceStrings(self):
+    """Replace 'replaceme' strings in generated files with a root libname.
+
+    If we have no root libname (e.g. no shlib was specified), do nothing.
+    """
+    if not self._root_name:
+      return
+    logging.warn('Replacing "replaceme" with ' + self._root_name)
+    for f in self._REPLACEME_FILES:
+      dest = os.path.join(self._output_directory, f)
+      contents = open(dest).read()
+      contents = contents.replace('replaceme', self._root_name)
+      dest = dest.replace('replaceme', self._root_name) # update the filename!
+      open(dest, "w").write(contents)
+
+  def _CopyLibraryAndJars(self):
+    """Copy the shlib and jars into the apk source tree (if relevant)"""
+    if self._native_library:
+      destdir = os.path.join(self._output_directory, 'libs/armeabi')
+      if not os.path.exists(destdir):
+        os.makedirs(destdir)
+      dest = os.path.join(destdir, os.path.basename(self._native_library))
+      logging.warn('%s --> %s' % (self._native_library, dest))
+      shutil.copyfile(self._native_library, dest)
+    if self._jars:
+      destdir = os.path.join(self._output_directory, 'libs')
+      if not os.path.exists(destdir):
+        os.makedirs(destdir)
+      for jar in self._jars:
+        dest = os.path.join(destdir, os.path.basename(jar))
+        logging.warn('%s --> %s' % (jar, dest))
+        shutil.copyfile(jar, dest)
+
+  def CreateBundle(self):
+    """Create the apk bundle source and assemble components."""
+    self._CopyTemplateFiles()
+    self._ReplaceStrings()
+    self._CopyLibraryAndJars()
+
+  def Compile(self, ant_args):
+    """Build the generated apk with ant.
+
+    Args:
+      ant_args: extra args to pass to ant
+    """
+    cmd = ['ant']
+    if ant_args:
+      cmd.append(ant_args)
+    cmd.extend(['-buildfile',
+                os.path.join(self._output_directory, 'native_test_apk.xml')])
+    logging.warn(cmd)
+    p = subprocess.Popen(cmd, stderr=subprocess.STDOUT)
+    (stdout, _) = p.communicate()
+    logging.warn(stdout)
+    if p.returncode != 0:
+      logging.error('Ant return code %d' % p.returncode)
+      sys.exit(p.returncode)
+
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--verbose',
+                    help='Be verbose')
+  parser.add_option('--native_library',
+                    help='Full name of native shared library test bundle')
+  parser.add_option('--jar', action='append',
+                    help='Include this jar; can be specified multiple times')
+  parser.add_option('--output',
+                    help='Output directory for generated files.')
+  parser.add_option('--ant-compile', action='store_true',
+                    help='If specified, build the generated apk with ant')
+  parser.add_option('--ant-args',
+                    help='extra args for ant')
+
+  options, _ = parser.parse_args(argv)
+
+  # It is not an error to specify no native library; the apk should
+  # still be generated and build.  It will, however, print
+  # NATIVE_LOADER_FAILED when run.
+  if not options.output:
+    raise Exception('No output directory specified for generated files')
+
+  if options.verbose:
+    logging.basicConfig(level=logging.DEBUG, format=' %(message)s')
+
+  ntag = NativeTestApkGenerator(native_library=options.native_library,
+                                jars=options.jar,
+                                output_directory=options.output)
+  ntag.CreateBundle()
+  if options.ant_compile:
+    ntag.Compile(options.ant_args)
+
+  logging.warn('COMPLETE.')
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))
diff --git a/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java b/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
new file mode 100644
index 0000000..b4bb6ad
--- /dev/null
+++ b/testing/android/java/src/org/chromium/native_test/ChromeNativeTestActivity.java
@@ -0,0 +1,66 @@
+// 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.
+
+package org.chromium.native_test;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.util.Log;
+
+// Android's NativeActivity is mostly useful for pure-native code.
+// Our tests need to go up to our own java classes, which is not possible using
+// the native activity class loader.
+// We start a background thread in here to run the tests and avoid an ANR.
+// TODO(bulach): watch out for tests that implicitly assume they run on the main
+// thread.
+public class ChromeNativeTestActivity extends Activity {
+    private final String TAG = "ChromeNativeTestActivity";
+
+    // Name of our shlib as obtained from a string resource.
+    private String mLibrary;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mLibrary = getResources().getString(R.string.native_library);
+        if ((mLibrary == null) || mLibrary.startsWith("replace")) {
+            nativeTestFailed();
+            return;
+        }
+
+        try {
+            loadLibrary();
+            new Thread() {
+                @Override
+                public void run() {
+                    Log.d(TAG, ">>nativeRunTests");
+                    nativeRunTests(getFilesDir().getAbsolutePath());
+                    // TODO(jrg): make sure a crash in native code
+                    // triggers nativeTestFailed().
+                    Log.d(TAG, "<<nativeRunTests");
+                }
+            }.start();
+        } catch (UnsatisfiedLinkError e) {
+            Log.e(TAG, "Unable to load lib" + mLibrary + ".so: " + e);
+            nativeTestFailed();
+            throw e;
+        }
+    }
+
+    // Signal a failure of the native test loader to python scripts
+    // which run tests.  For example, we look for
+    // RUNNER_FAILED build/android/test_package.py.
+    private void nativeTestFailed() {
+        Log.e(TAG, "[ RUNNER_FAILED ] could not load native library");
+    }
+
+    private void loadLibrary() throws UnsatisfiedLinkError {
+        Log.i(TAG, "loading: " + mLibrary);
+        System.loadLibrary(mLibrary);
+        Log.i(TAG, "loaded: " + mLibrary);
+    }
+
+    private native void nativeRunTests(String filesDir);
+}
diff --git a/testing/android/native_test.gyp b/testing/android/native_test.gyp
new file mode 100644
index 0000000..1b60cbf
--- /dev/null
+++ b/testing/android/native_test.gyp
@@ -0,0 +1,96 @@
+# 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.
+
+{
+  'conditions': [
+    ['OS=="android"', {
+      'targets': [
+        {
+          'target_name': 'native_test_apk',
+          'message': 'building native test apk',
+          'type': 'none',
+          'dependencies': [
+            'native_test_native_code',
+          ],
+          'actions': [
+            {
+              'action_name': 'native_test_apk',
+              'inputs': [
+                '<(DEPTH)/testing/android/native_test_apk.xml',
+                '<!@(find <(DEPTH)/testing/android -name "*.java")',
+                'native_test_launcher.cc'
+              ],
+              'outputs': [
+                # Awkwardly, we build a Debug APK even when gyp is in
+                # Release mode.  I don't think it matters (e.g. we're
+                # probably happy to not codesign) but naming should be
+                # fixed.  The -debug name is an aspect of the android
+                # SDK antfiles (e.g. ${sdk.dir}/tools/ant/build.xml)
+                '<(PRODUCT_DIR)/ChromeNativeTests-debug.apk',
+              ],
+              'action': [
+                'ant',
+                '-DPRODUCT_DIR=<(PRODUCT_DIR)',
+                '-buildfile',
+                '<(DEPTH)/testing/android/native_test_apk.xml',
+              ]
+            }
+          ],
+        },
+        {
+          'target_name': 'native_test_native_code',
+          'message': 'building native pieces of native test package',
+          'type': 'static_library',
+           'sources': [
+             'native_test_launcher.cc',
+           ],
+          'direct_dependent_settings': {
+            'ldflags!': [
+              # JNI_OnLoad is implemented in a .a and we need to
+              # re-export in the .so.
+              '-Wl,--exclude-libs=ALL',
+            ],
+          },
+          'dependencies': [ 
+            'jni_headers',
+            '../../base/base.gyp:base',
+            '../../base/base.gyp:test_support_base',
+            '../gtest.gyp:gtest',
+          ],
+        },
+        {
+          'target_name': 'jni_headers',
+          'type': 'none',
+          'actions': [
+            {
+              'action_name': 'generate_jni_headers',
+              'inputs': [
+                '../../base/android/jni_generator/jni_generator.py',
+                'java/src/org/chromium/native_test/ChromeNativeTestActivity.java'
+              ],
+              'outputs': [
+                '<(SHARED_INTERMEDIATE_DIR)/testing/android/jni/'
+                'chrome_native_test_activity_jni.h',
+              ],
+              'action': [
+                'python',
+                '../../base/android/jni_generator/jni_generator.py',
+                '-o',
+                '<@(_inputs)',
+                '<@(_outputs)',
+              ],
+            }
+          ],
+          # So generated jni headers can be found by targets that
+          # depend on this.
+          'direct_dependent_settings': {
+            'include_dirs': [
+              '<(SHARED_INTERMEDIATE_DIR)',
+            ],
+          },
+        },
+      ],
+    }]
+  ],
+}
diff --git a/testing/android/native_test_apk.xml b/testing/android/native_test_apk.xml
new file mode 100644
index 0000000..bae45ce
--- /dev/null
+++ b/testing/android/native_test_apk.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+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.
+-->
+
+<project name="ChromeNativeTests" default="debug" basedir=".">
+
+  <description>
+    Building native test runner ChromeNativeTests_replaceme.apk
+  </description>
+
+  <property environment="env"/>
+  <property name="sdk.dir" location="${env.ANDROID_SDK_ROOT}"/>
+  <property name="sdk.version" value="${env.ANDROID_SDK_VERSION}"/>
+  <property name="src" location="."/>
+
+  <!-- TODO(jrg): although the source.dir setting points the android
+  antfiles to the correct location for finding our java, and our jars
+  are rebuilt when the java changes, a re-javac does not trigger a
+  re-package of our apk.  Fix.  -->
+  <property name="source.dir" location="java"/>
+
+  <property name="target" value="android-${env.ANDROID_SDK_VERSION}"/>
+
+  <condition property="location.base" 
+             value="${sdk.dir}" 
+             else="${sdk.dir}/platforms/android-${sdk.version}">
+    <isset property="env.ANDROID_BUILD_TOP"/>
+  </condition>
+
+  <!-- We expect PRODUCT_DIR to be set like the gyp var
+       (e.g. $ROOT/out/Debug) -->
+  <!-- TODO(jrg): ideally we need this to run before -build-setup, where
+       directories are made based on this variable. -->
+  <target name="-pre-build">
+    <if>
+      <condition>
+        <isset property="PRODUCT_DIR" />
+      </condition>
+      <else>
+        <fail message="PRODUCT_DIR env var not set?" />
+      </else>
+    </if>
+  </target>
+
+  <property name="out.dir" location="${PRODUCT_DIR}/replaceme_apk"/>
+
+  <!-- TODO(jrg): should I make this directory specific to the apk? -->
+  <property name="gen.absolute.dir" value="${out.dir}/gen"/>
+
+  <import file="${sdk.dir}/tools/ant/build.xml" />
+
+</project>
diff --git a/testing/android/native_test_launcher.cc b/testing/android/native_test_launcher.cc
new file mode 100644
index 0000000..bc5d47f
--- /dev/null
+++ b/testing/android/native_test_launcher.cc
@@ -0,0 +1,190 @@
+// 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.
+
+#include <stdio.h>
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/android/path_utils.h"
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/stringprintf.h"
+#include "base/string_tokenizer.h"
+#include "base/string_util.h"
+#include "base/test/test_suite.h"
+#include "testing/android/jni/chrome_native_test_activity_jni.h"
+#include "gtest/gtest.h"
+
+// GTest's main function.
+extern int main(int argc, char** argv);
+
+namespace {
+
+void ParseArgsFromString(const std::string& command_line,
+                         std::vector<std::string>* args) {
+  StringTokenizer tokenizer(command_line, kWhitespaceASCII);
+  tokenizer.set_quote_chars("\"");
+  while (tokenizer.GetNext()) {
+    std::string token;
+    RemoveChars(tokenizer.token(), "\"", &token);
+    args->push_back(token);
+  }
+}
+
+void ParseArgsFromCommandLineFile(const FilePath& internal_data_path,
+                                  std::vector<std::string>* args) {
+  static const char kCommandLineFile[] = "chrome-native-tests-command-line";
+  FilePath command_line(internal_data_path.Append(FilePath(kCommandLineFile)));
+  std::string command_line_string;
+  if (file_util::ReadFileToString(command_line, &command_line_string)) {
+    ParseArgsFromString(command_line_string, args);
+  }
+}
+
+void ArgsToArgv(const std::vector<std::string>& args,
+                std::vector<char*>* argv) {
+  // We need to pass in a non-const char**.
+  int argc = args.size();
+  argv->resize(argc);
+  for (int i = 0; i < argc; ++i)
+    (*argv)[i] = const_cast<char*>(args[i].c_str());
+}
+
+// As we are the native side of an Android app, we don't have any 'console', so
+// gtest's standard output goes nowhere.
+// Instead, we inject an "EventListener" in gtest and then we print the results
+// using LOG, which goes to adb logcat.
+class AndroidLogPrinter : public ::testing::EmptyTestEventListener {
+ public:
+  void Init(int* argc, char** argv);
+
+  // EmptyTestEventListener
+  virtual void OnTestProgramStart(
+      const ::testing::UnitTest& unit_test) OVERRIDE;
+  virtual void OnTestStart(const ::testing::TestInfo& test_info) OVERRIDE;
+  virtual void OnTestPartResult(
+      const ::testing::TestPartResult& test_part_result) OVERRIDE;
+  virtual void OnTestEnd(const ::testing::TestInfo& test_info) OVERRIDE;
+  virtual void OnTestProgramEnd(const ::testing::UnitTest& unit_test) OVERRIDE;
+};
+
+void AndroidLogPrinter::Init(int* argc, char** argv) {
+  // InitGoogleTest must be called befure we add ourselves as a listener.
+  ::testing::InitGoogleTest(argc, argv);
+  ::testing::TestEventListeners& listeners =
+      ::testing::UnitTest::GetInstance()->listeners();
+  // Adds a listener to the end.  Google Test takes the ownership.
+  listeners.Append(this);
+}
+
+void AndroidLogPrinter::OnTestProgramStart(
+    const ::testing::UnitTest& unit_test) {
+  std::string msg = StringPrintf("[ START      ] %d",
+                                 unit_test.test_to_run_count());
+  LOG(ERROR) << msg;
+}
+
+void AndroidLogPrinter::OnTestStart(const ::testing::TestInfo& test_info) {
+  std::string msg = StringPrintf("[ RUN      ] %s.%s",
+                                 test_info.test_case_name(), test_info.name());
+  LOG(ERROR) << msg;
+}
+
+void AndroidLogPrinter::OnTestPartResult(
+    const ::testing::TestPartResult& test_part_result) {
+  std::string msg = StringPrintf(
+      "%s in %s:%d\n%s\n",
+      test_part_result.failed() ? "*** Failure" : "Success",
+      test_part_result.file_name(),
+      test_part_result.line_number(),
+      test_part_result.summary());
+  LOG(ERROR) << msg;
+}
+
+void AndroidLogPrinter::OnTestEnd(const ::testing::TestInfo& test_info) {
+  std::string msg = StringPrintf("%s %s.%s",
+      test_info.result()->Failed() ? "[  FAILED  ]" : "[       OK ]",
+      test_info.test_case_name(), test_info.name());
+  LOG(ERROR) << msg;
+}
+
+void AndroidLogPrinter::OnTestProgramEnd(
+    const ::testing::UnitTest& unit_test) {
+  std::string msg = StringPrintf("[ END      ] %d",
+         unit_test.successful_test_count());
+  LOG(ERROR) << msg;
+}
+
+void LibraryLoadedOnMainThread(JNIEnv* env) {
+  static const char* const kInitialArgv[] = { "ChromeTestActivity" };
+
+  {
+    // We need a test suite to be created before we do any tracing or
+    // logging: it creates a global at_exit_manager and initializes
+    // internal gtest data structures based on the command line.
+    // It needs to be scoped as it also resets the CommandLine.
+    std::vector<std::string> args;
+    FilePath path("/data/user/0/org.chromium.native_tests/files/");
+    ParseArgsFromCommandLineFile(path, &args);
+    std::vector<char*> argv;
+    ArgsToArgv(args, &argv);
+    base::TestSuite test_suite(argv.size(), &argv[0]);
+  }
+
+  CommandLine::Init(arraysize(kInitialArgv), kInitialArgv);
+
+  logging::InitLogging(NULL,
+                       logging::LOG_ONLY_TO_SYSTEM_DEBUG_LOG,
+                       logging::DONT_LOCK_LOG_FILE,
+                       logging::DELETE_OLD_LOG_FILE,
+                       logging::ENABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS);
+  // To view log output with IDs and timestamps use "adb logcat -v threadtime".
+  logging::SetLogItems(false,    // Process ID
+                       false,    // Thread ID
+                       false,    // Timestamp
+                       false);   // Tick count
+  VLOG(0) << "Chromium logging enabled: level = " << logging::GetMinLogLevel()
+          << ", default verbosity = " << logging::GetVlogVerbosity();
+  base::android::RegisterPathUtils(env);
+}
+
+}  // namespace
+
+// This method is called on a separate java thread so that we won't trigger
+// an ANR.
+static void RunTests(JNIEnv* env, jobject obj, jstring jfiles_dir) {
+  FilePath files_dir(base::android::ConvertJavaStringToUTF8(env, jfiles_dir));
+  // A few options, such "--gtest_list_tests", will just use printf directly
+  // and won't use the "AndroidLogPrinter". Redirect stdout to a known file.
+  FilePath stdout_path(files_dir.Append(FilePath("stdout.txt")));
+  freopen(stdout_path.value().c_str(), "w", stdout);
+
+  std::vector<std::string> args;
+  ParseArgsFromCommandLineFile(files_dir, &args);
+
+  // We need to pass in a non-const char**.
+  std::vector<char*> argv;
+  ArgsToArgv(args, &argv);
+
+  int argc = argv.size();
+  // This object is owned by gtest.
+  AndroidLogPrinter* log = new AndroidLogPrinter();
+  log->Init(&argc, &argv[0]);
+
+  main(argc, &argv[0]);
+}
+
+// This is called by the VM when the shared library is first loaded.
+JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+  base::android::InitVM(vm);
+  JNIEnv* env = base::android::AttachCurrentThread();
+  if (!RegisterNativesImpl(env)) {
+    return -1;
+  }
+  LibraryLoadedOnMainThread(env);
+  return JNI_VERSION_1_4;
+}
diff --git a/testing/android/res/values/strings.xml b/testing/android/res/values/strings.xml
new file mode 100644
index 0000000..1597eb69
--- /dev/null
+++ b/testing/android/res/values/strings.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+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.
+-->
+<resources>
+  <!-- argument to pass to System.loadLibrary().  E.g. base_unittests
+  for loading libbase_unittests.so. -->
+  <string name="native_library">replaceme</string>  
+</resources>