Refactoring AndroidKeyStore to support a KeyStore running in another process

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

+// 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;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Abstract private key that bundles the PrivateKey and AndroidKeyStore that it belongs to.
+ */
+@JNINamespace("net::android")
+public interface AndroidPrivateKey {
+    /** @return AndroidKeyStore that handles this key. */
+    @CalledByNative
+    AndroidKeyStore getKeyStore();
+}