MacViews: Implement Full Keyboard Access.

ui/views/test/views_test_helper_mac.h

 // 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.
 
 #ifndef UI_VIEWS_TEST_VIEWS_TEST_HELPER_MAC_H_
 #define UI_VIEWS_TEST_VIEWS_TEST_HELPER_MAC_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "ui/views/test/views_test_helper.h"
 
 namespace ui {
 namespace test {
+class ScopedFakeFullKeyboardAccess;
 class ScopedFakeNSWindowFocus;
 class ScopedFakeNSWindowFullscreen;
 }
 class ScopedAnimationDurationScaleMode;
 }
 
 namespace views {
 
 class ViewsTestHelperMac : public ViewsTestHelper {
  public:
@@ skipping 14 matching lines @@
   // tests, |faked_focus_| is initialized, permitting a unit test to "fake" this
   // activation, causing it to be synchronous and per-process instead.
   std::unique_ptr<ui::test::ScopedFakeNSWindowFocus> faked_focus_;
 
   // Toggling fullscreen mode on Mac can be flaky for tests run in parallel
   // because only one window may be animating into or out of fullscreen at a
   // time. In non-interactive/sharded tests, |faked_fullscreen_| is initialized,
   // permitting a unit test to 'fake' toggling fullscreen mode.
   std::unique_ptr<ui::test::ScopedFakeNSWindowFullscreen> faked_fullscreen_;
 
+  // Enable fake full keyboard access by default, so that tests don't depend on
+  // system setting of the test machine. Also, this helps to make tests on Mac
+  // more consistent with other platforms, where most views are focusable by
+  // default.
+  std::unique_ptr<ui::test::ScopedFakeFullKeyboardAccess>
+      faked_full_keyboard_access_;
+
   DISALLOW_COPY_AND_ASSIGN(ViewsTestHelperMac);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_TEST_VIEWS_TEST_HELPER_MAC_H_