Add Java function to retrieve the native library dir.

base/android/java/org/chromium/base/PathUtils.java

 // 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.base;
 
 import android.content.Context;
+import android.content.pm.ApplicationInfo;
 import android.os.Environment;
 
 import org.chromium.base.CalledByNative;
 
 import java.io.File;
 
 /**
  * This class provides the path related methods for the native library.
  */
 class PathUtils {
@@ skipping 16 matching lines @@
     }
 
     /**
      * @return the public downloads directory.
      */
     @CalledByNative
     public static String getDownloadsDirectory(Context appContext) {
         return Environment.getExternalStoragePublicDirectory(
                 Environment.DIRECTORY_DOWNLOADS).getPath();
     }
+
+    /**
+     * @return the path to native libraries.
+     */
+    @CalledByNative
+    public static String getNativeLibraryDirectory(Context appContext) {
+        ApplicationInfo ai = appContext.getApplicationInfo();
+        if ((ai.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0 ||
+            (ai.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
+            return ai.nativeLibraryDir;
+        }
+
+        return "/system/lib/";
+    }
 }