Add Java function to retrieve the native library dir.

base/android/path_utils_unittest.cc

 // 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 "base/android/path_utils.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace android {
 
 typedef testing::Test PathUtilsTest;
 
 TEST_F(PathUtilsTest, TestGetDataDirectory) {
   // The string comes from the Java side and depends on the APK
   // we are running in. Assumes that we are packaged in
   // org.chromium.native_test
   EXPECT_STREQ("/data/data/org.chromium.native_test/app_chrome",
                GetDataDirectory().c_str());
 }
 
 TEST_F(PathUtilsTest, TestGetCacheDirectory) {
   // The string comes from the Java side and depends on the APK
   // we are running in. Assumes that we are packaged in
   // org.chromium.native_test
   EXPECT_STREQ("/data/data/org.chromium.native_test/cache",
                GetCacheDirectory().c_str());
 }
 
+TEST_F(PathUtilsTest, TestGetNativeLibraryDirectory) {
+  // The string comes from the Java side and depends on the APK
+  // we are running in. Assumes that we are packaged in
+  // org.chromium.native_test
+  EXPECT_STREQ("/data/data/org.chromium.native_test/lib",
+               GetNativeLibraryDirectory().c_str());
+}
+
 }  // namespace android
 }  // namespace base