Implement Increment and Decrement accessible actions

content/browser/accessibility/browser_accessibility_manager.cc

Index: content/browser/accessibility/browser_accessibility_manager.cc
diff --git a/content/browser/accessibility/browser_accessibility_manager.cc b/content/browser/accessibility/browser_accessibility_manager.cc
index 53768e2712b90aefce483a7fdee29596186508d1..cc23ee45d48c4fba3feb573ea270d8efbc95613e 100644
--- a/content/browser/accessibility/browser_accessibility_manager.cc
+++ b/content/browser/accessibility/browser_accessibility_manager.cc
@@ -582,6 +582,17 @@ void BrowserAccessibilityManager::SetFocusChangeCallbackForTesting(
   g_focus_change_callback_for_testing.Get() = callback;
 }
 
+void BrowserAccessibilityManager::Decrement(
+    const BrowserAccessibility& node) {
+  if (!delegate_)
+    return;
+
+  ui::AXActionData action_data;
+  action_data.action = ui::AX_ACTION_DECREMENT;
+  action_data.target_node_id = node.GetId();
+  delegate_->AccessibilityPerformAction(action_data);
+}
+
 void BrowserAccessibilityManager::DoDefaultAction(
     const BrowserAccessibility& node) {
   if (!delegate_)
@@ -593,6 +604,17 @@ void BrowserAccessibilityManager::DoDefaultAction(
   delegate_->AccessibilityPerformAction(action_data);
 }
 
+void BrowserAccessibilityManager::Increment(
+    const BrowserAccessibility& node) {
+  if (!delegate_)
+    return;
+
+  ui::AXActionData action_data;
+  action_data.action = ui::AX_ACTION_INCREMENT;
+  action_data.target_node_id = node.GetId();
+  delegate_->AccessibilityPerformAction(action_data);
+}
+
 void BrowserAccessibilityManager::ShowContextMenu(
     const BrowserAccessibility& node) {
   if (!delegate_)