[Android] Allow custom ActionMode creation via ContentViewClient

content/public/android/java/src/org/chromium/content/browser/SelectActionMode.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.content.browser;
+
+import android.util.Log;
+import android.view.ActionMode;
+
+/**
+ * An ActionMode for in-page selection. This class wraps an ActionMode created
+ * by the associated View, providing modified interaction with that ActionMode.
+ */
+public class SelectActionMode {
+    private static final String TAG = "SelectActionMode";
+
+    protected final ActionMode mActionMode;
+
+    /**
+     * Constructs a SelectActionMode instance wrapping a concrete ActionMode.
+     * @param actionMode the wrapped ActionMode.
+     */
+    public SelectActionMode(ActionMode actionMode) {
+        mActionMode = actionMode;
+    }
+
+    /**
+     * @see ActionMode#finish()
+     */
+    public void finish() {
+        mActionMode.finish();
+    }
+
+    /**
+     * @see ActionMode#invalidate()
+     */
+    public void invalidate() {
+        // Try/catch necessary for framework bug, crbug.com/446717.
+        try {
+            mActionMode.invalidate();
+        } catch (NullPointerException e) {
+            Log.w(TAG, "Ignoring NPE from ActionMode.invalidate() as workaround for L", e);
+        }
+    }
+
+    /**
+     * @see ActionMode#invalidateContentRect()
+     */
+    public void invalidateContentRect() {}
+}