Upstream chromium side of modal dialogs for webview.

android_webview/java/src/org/chromium/android_webview/JsResultReceiver.java

Index: android_webview/java/src/org/chromium/android_webview/JsResultReceiver.java
diff --git a/android_webview/java/src/org/chromium/android_webview/JsResultReceiver.java b/android_webview/java/src/org/chromium/android_webview/JsResultReceiver.java
new file mode 100644
index 0000000000000000000000000000000000000000..30df245003c5e052f990a550ac530198bb7cb59d
--- /dev/null
+++ b/android_webview/java/src/org/chromium/android_webview/JsResultReceiver.java
@@ -0,0 +1,18 @@
+// 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.android_webview;
+
+/**
+ * This interface is used when the AwContentsClient offers a JavaScript
+ * modal dialog (alert, beforeunload or confirm) to enable the client to
+ * handle the dialog in their own way. AwContentsClient will offer an object
+ * that implements this interface to the client and when the client has handled
+ * the dialog, it must either callback with confirm() or cancel() to allow
+ * processing to continue.
+ */
+public interface JsResultReceiver {
+    public void confirm();
+    public void cancel();
+}