diff -r 000000000000 -r 6474c204b198 mobile/android/base/mozglue/ByteBufferInputStream.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/mozglue/ByteBufferInputStream.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* -*- 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 java.io.InputStream;
+import java.nio.ByteBuffer;
+
+class ByteBufferInputStream extends InputStream {
+
+    protected ByteBuffer mBuf;
+    // Reference to a native object holding the data backing the ByteBuffer.
+    private NativeReference mNativeRef;
+
+    protected ByteBufferInputStream(ByteBuffer buffer, NativeReference ref) {
+        mBuf = buffer;
+        mNativeRef = ref;
+    }
+
+    @Override
+    public int available() {
+        return mBuf.remaining();
+    }
+
+    @Override
+    public void close() {
+        mBuf = null;
+        mNativeRef.release();
+    }
+
+    @Override
+    public int read() {
+        if (!mBuf.hasRemaining() || mNativeRef.isReleased()) {
+            return -1;
+        }
+
+        return mBuf.get() & 0xff; // Avoid sign extension
+    }
+
+    @Override
+    public int read(byte[] buffer, int offset, int length) {
+        if (!mBuf.hasRemaining() || mNativeRef.isReleased()) {
+            return -1;
+        }
+
+        length = Math.min(length, mBuf.remaining());
+        mBuf.get(buffer, offset, length);
+        return length;
+    }
+
+    @Override
+    public long skip(long byteCount) {
+        if (byteCount < 0 || mNativeRef.isReleased()) {
+            return 0;
+        }
+
+        byteCount = Math.min(byteCount, mBuf.remaining());
+        mBuf.position(mBuf.position() + (int)byteCount);
+        return byteCount;
+    }
+
+}