Java versions of BlimpContents[,Observer] and BlimpNavigationController

blimp/client/core/public/android/java/src/org/chromium/blimp/core_public/BlimpNavigationController.java

Index: blimp/client/core/public/android/java/src/org/chromium/blimp/core_public/BlimpNavigationController.java
diff --git a/blimp/client/core/public/android/java/src/org/chromium/blimp/core_public/BlimpNavigationController.java b/blimp/client/core/public/android/java/src/org/chromium/blimp/core_public/BlimpNavigationController.java
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@@ -0,0 +1,29 @@
+// Copyright 2016 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.blimp.core_public;
+
+/**
+ * BlimpNavigationController is the Java representation of a native BlimpNavigationController
+ * object.
+ *
+ * The BlimpNavigationController maintains the back-forward list for a {@link BlimpContents} and
+ * manages all navigation within that list.
+ *
+ * Each BlimpNavigationController belongs to one {@link BlimpContents}, and each
+ * {@link BlimpContents} has exactly one BlimpNavigationController.
+ */
+public interface BlimpNavigationController {
+
+    /**
+     * Calls to loadUrl informs the engine that it should start navigating to the provided |url|.
+     * @param url the URL to start navigation to.
+     */
+    void loadUrl(String url);
+
+    /**
+     * Retrieves the URL of the currently selected item in the navigation list.
+     */
+    String getUrl();
+}