Re-submit of AppLink implementation.

chrome/android/java/src/org/chromium/chrome/browser/AppLinkHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/AppLinkHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/AppLinkHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/AppLinkHandler.java
new file mode 100644
index 0000000000000000000000000000000000000000..40aba28a10ed53c38f5ca779d0d224d97f63023c
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/AppLinkHandler.java
@@ -0,0 +1,38 @@
+// 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;
+
+import android.content.Context;
+import android.content.Intent;
+
+/** App link handler. */
+public class AppLinkHandler {
+
+    private static final Object INSTANCE_LOCK = new Object();
+    private static AppLinkHandler sInstance;
+
+    public static AppLinkHandler getInstance(ChromeApplication application) {
+        synchronized (INSTANCE_LOCK) {
+            if (sInstance == null) {
+                sInstance = application.createAppLinkHandler();
+            }
+        }
+        return sInstance;
+    }
+
+    /** Cache whether the feature is enabled. */
+    public void cacheAppLinkEnabled(Context context) {
+    }
+
+    /** Handle intent. */
+    public boolean handleIntent(Context context, Intent intent, boolean isCustomTabsIntent) {
+        return false;
+    }
+
+    /** Commit metrics. */
+    public void commitMetrics() {
+    }
+
+}