Refactor AndroidKeyStore to allow remote key handling.

net/android/java/src/org/chromium/net/AndroidPrivateKey.java

Index: net/android/java/src/org/chromium/net/AndroidPrivateKey.java
diff --git a/net/android/java/src/org/chromium/net/AndroidPrivateKey.java b/net/android/java/src/org/chromium/net/AndroidPrivateKey.java
new file mode 100644
index 0000000000000000000000000000000000000000..53ef7b33b5ee3d78686762c241047b038c1ac49c
--- /dev/null
+++ b/net/android/java/src/org/chromium/net/AndroidPrivateKey.java
@@ -0,0 +1,13 @@
+// Copyright 2014 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.net;
+
+/**
+ * Abstract private key that bundles the AndroidKeyStore that it belongs to.
+ */
+public interface AndroidPrivateKey {
+    /** @return AndroidKeyStore that handles this key. */
+    AndroidKeyStore getKeyStore();
+}