Adding BlimpNavigationController to Tab

chrome/android/java/src/org/chromium/chrome/browser/tab/TabBlimpContentsObserver.java

+// 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.chrome.browser.tab;
+
+import org.chromium.base.ObserverList.RewindableIterator;
+import org.chromium.blimp_public.contents.BlimpContentsObserver;
+
+/**
+ * BlimpContentsObserver used by Tab.
+ */
+public class TabBlimpContentsObserver implements BlimpContentsObserver {
+    private Tab mTab;
+
+    public TabBlimpContentsObserver(Tab tab) {
+        mTab = tab;
+    }
+
+    /**
+     * All UI updates related to navigation state should be notified from this method.
+     */
+    @Override
+    public void onNavigationStateChanged() {
+        mTab.updateTitle();
+        RewindableIterator<TabObserver> observers = mTab.getTabObservers();
+        while (observers.hasNext()) {
+            observers.next().onUrlUpdated(mTab);
+        }
+    }
+}