MacViews/a11y: Allow accessibility clients to focus and unfocus focusable Views.

ui/views/accessibility/native_view_accessibility.cc

 // Copyright (c) 2013 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 "ui/views/accessibility/native_view_accessibility.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "ui/accessibility/ax_action_data.h"
 #include "ui/accessibility/ax_node_data.h"
@@ skipping 199 matching lines @@
   action_data.value = new_value;
   action_data.action = clear_first ? ui::AX_ACTION_SET_VALUE
       : ui::AX_ACTION_REPLACE_SELECTED_TEXT;
   return view_->HandleAccessibleAction(action_data);
 }
 
 bool NativeViewAccessibility::CanSetStringValue() {
   return !ui::AXNodeData::IsFlagSet(GetData().state, ui::AX_STATE_READ_ONLY);
 }
 
+bool NativeViewAccessibility::SetFocused(bool focused) {
+  if (!ui::AXNodeData::IsFlagSet(GetData().state, ui::AX_STATE_FOCUSABLE))
+    return false;
+
+  if (focused)
+    view_->RequestFocus();
+  else if (view_->HasFocus())
+    view_->GetFocusManager()->ClearFocus();
+  return true;
+}
+
 void NativeViewAccessibility::OnWidgetDestroying(Widget* widget) {
   if (parent_widget_ == widget) {
     parent_widget_->RemoveObserver(this);
     parent_widget_ = nullptr;
   }
 }
 
 void NativeViewAccessibility::SetParentWidget(Widget* parent_widget) {
   if (parent_widget_)
     parent_widget_->RemoveObserver(this);
@@ skipping 30 matching lines @@
               child_widget_platform_node->GetDelegate());
       if (child_widget_view_accessibility->parent_widget() != widget)
         child_widget_view_accessibility->SetParentWidget(widget);
     }
 
     result_child_widgets->push_back(child_widget);
   }
 }
 
 }  // namespace views