Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/CustomSelectionActionModeCallback.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;
+
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
+
+/**
+ * A class that represents a custom ActionMode.Callback.
+ */
+public class CustomSelectionActionModeCallback implements ActionMode.Callback {
+
+    private ContextualMenuBar mContextualMenuBar;
+
+    /**
+     * Sets the @param contextualMenuBar.
+     */
+    public void setContextualMenuBar(ContextualMenuBar contextualMenuBar) {
+        mContextualMenuBar = contextualMenuBar;
+    }
+
+    @Override
+    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        return true;
+    }
+
+    @Override
+    public void onDestroyActionMode(ActionMode mode) {
+        mContextualMenuBar.hideControls();
+    }
+
+    @Override
+    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+        mContextualMenuBar.showControls();
+        return true;
+    }
+
+    @Override
+    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        return false;
+    }
+}