diff -r 000000000000 -r 6474c204b198 mobile/android/base/mozglue/NativeZip.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/mozglue/NativeZip.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,87 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.mozglue;
+
+import org.mozilla.gecko.mozglue.generatorannotations.WrapElementForJNI;
+
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+public class NativeZip implements NativeReference {
+    private static final int DEFLATE = 8;
+    private static final int STORE = 0;
+
+    private volatile long mObj;
+    private InputStream mInput;
+
+    public NativeZip(String path) {
+        mObj = getZip(path);
+        mInput = null;
+    }
+
+    public NativeZip(InputStream input) {
+        if (!(input instanceof ByteBufferInputStream)) {
+            throw new IllegalArgumentException("Got " + input.getClass()
+                                               + ", but expected ByteBufferInputStream!");
+        }
+        ByteBufferInputStream bbinput = (ByteBufferInputStream)input;
+        mObj = getZipFromByteBuffer(bbinput.mBuf);
+        mInput = input;
+    }
+
+    @Override
+    public void finalize() {
+        release();
+    }
+
+    public void close() {
+        release();
+    }
+
+    @Override
+    public void release() {
+        if (mObj != 0) {
+            _release(mObj);
+            mObj = 0;
+        }
+        mInput = null;
+    }
+
+    @Override
+    public boolean isReleased() {
+        return (mObj == 0);
+    }
+
+    public InputStream getInputStream(String path) {
+        if (isReleased()) {
+            throw new IllegalStateException("Can't get path \"" + path
+                                            + "\" because NativeZip is closed!");
+        }
+        return _getInputStream(mObj, path);
+    }
+
+    private static native long getZip(String path);
+    private static native long getZipFromByteBuffer(ByteBuffer buffer);
+    private static native void _release(long obj);
+    private native InputStream _getInputStream(long obj, String path);
+
+    @WrapElementForJNI
+    private InputStream createInputStream(ByteBuffer buffer, int compression) {
+        if (compression != STORE && compression != DEFLATE) {
+            throw new IllegalArgumentException("Unexpected compression: " + compression);
+        }
+
+        InputStream input = new ByteBufferInputStream(buffer, this);
+        if (compression == DEFLATE) {
+            Inflater inflater = new Inflater(true);
+            input = new InflaterInputStream(input, inflater);
+        }
+
+        return input;
+    }
+}