Switch AccessibilityMode to be a bitmap

content/browser/accessibility/accessibility_mode_helper_unittest.cc

+// Copyright (c) 2014 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.
+
+#include "content/browser/accessibility/accessibility_mode_helper.h"
+#include "content/common/view_message_enums.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+unsigned int base_mode = AccessibilityModeOff;
+
+TEST(AccessibilityModeHelperTest, TestNoOpRemove) {
+  EXPECT_EQ(base_mode | AccessibilityModeComplete,
+            RemoveAccessibilityModeFrom(base_mode | AccessibilityModeComplete,
+                                        AccessibilityModeOff));
+}
+
+TEST(AccessibilityModeHelperTest, TestRemoveSelf) {
+  EXPECT_EQ(base_mode,
+            RemoveAccessibilityModeFrom(base_mode | AccessibilityModeComplete,
+                                        AccessibilityModeComplete));
+
+  EXPECT_EQ(
+      base_mode,
+      RemoveAccessibilityModeFrom(base_mode | AccessibilityModeEditableTextOnly,
+                                  AccessibilityModeEditableTextOnly));
+}
+
+TEST(AccessibilityModeHelperTest, TestAddMode) {
+  EXPECT_EQ(
+      base_mode | AccessibilityModeComplete,
+      AddAccessibilityModeTo(base_mode | AccessibilityModeEditableTextOnly,
+                             AccessibilityModeComplete));
+}
+
+}  // namespace content