Add more fine-grained accessibility modes.

content/browser/accessibility/accessibility_mode_helper_unittest.cc

-// Copyright 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 {
-
-TEST(AccessibilityModeHelperTest, TestNoOpRemove) {
-  EXPECT_EQ(AccessibilityModeComplete,
-            RemoveAccessibilityModeFrom(AccessibilityModeComplete,
-                                        AccessibilityModeOff));
-}
-
-TEST(AccessibilityModeHelperTest, TestRemoveSelf) {
-  AccessibilityMode kBaseMode = GetBaseAccessibilityMode();
-
-  EXPECT_EQ(kBaseMode,
-            RemoveAccessibilityModeFrom(AccessibilityModeComplete,
-                                        AccessibilityModeComplete));
-}
-
-TEST(AccessibilityModeHelperTest, TestAddMode) {
-  EXPECT_EQ(AccessibilityModeComplete,
-            AddAccessibilityModeTo(AccessibilityModeTreeOnly,
-                                   AccessibilityModeComplete));
-}
-
-}  // namespace content