Upstream Layout.java and associated files

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanelHost.java

+// Copyright 2015 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.compositor.bottombar.contextualsearch;
+
+/**
+ * Interface that allows {@link ContextualSearchPanel} to communicate with its host Layout.
+ */
+public interface ContextualSearchPanelHost {
+    /**
+     * Hides the Contextual Search Supported Layout.
+     * @param immediately Whether it should be hidden immediately.
+     */
+    void hideLayout(boolean immediately);
+}