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,
+            RemoveAccessibilityMode(base_mode | AccessibilityModeComplete,
+                                    AccessibilityModeOff));
+}
+
+TEST(AccessibilityModeHelperTest, TestRemoveSelf) {
+  EXPECT_EQ(base_mode,
+            RemoveAccessibilityMode(base_mode | AccessibilityModeComplete,
+                                    AccessibilityModeComplete));
+
+  EXPECT_EQ(
+      base_mode,
+      RemoveAccessibilityMode(base_mode | AccessibilityModeEditableTextOnly,
+                              AccessibilityModeEditableTextOnly));
+}
+
+TEST(AccessibilityModeHelperTest, TestRemovePart) {
+  EXPECT_EQ(base_mode | AccessibilityModeComplete,
+            RemoveAccessibilityMode(
+                AccessibilityModeComplete | AccessibilityModeEditableTextOnly,

[David Tseng, 2014/02/04 20:25:51]

This isn't ever allowed I think.

[aboxhall, 2014/02/05 16:02:47]

See comment elsewhere.

+                AccessibilityModeEditableTextOnly));
+}
+
+TEST(AccessibilityModeHelperTest, TestRemoveAll) {
+  EXPECT_EQ(base_mode,
+            RemoveAccessibilityMode(base_mode | AccessibilityModeComplete,
+                                    AccessibilityModeAll));
+  EXPECT_EQ(
+      base_mode,
+      RemoveAccessibilityMode(base_mode | AccessibilityModeEditableTextOnly,
+                              AccessibilityModeAll));
+}
+
+}  // namespace content