Add custom action support

chrome/common/extensions/api/automation.idl

Index: chrome/common/extensions/api/automation.idl
diff --git a/chrome/common/extensions/api/automation.idl b/chrome/common/extensions/api/automation.idl
index 4b8b0e7792422d8e37f2f64733207b8aeddb22e7..0df0d89b36da846b766cf23aa40a63b80ee7fdd5 100644
--- a/chrome/common/extensions/api/automation.idl
+++ b/chrome/common/extensions/api/automation.idl
@@ -366,6 +366,11 @@
   // A listener for changes on the <code>AutomationNode</code> tree.
   callback TreeChangeObserver = void(TreeChange treeChange);
 
+  dictionary CustomAction {
+    long id;
+    DOMString description;
+  };
+
   // A single node in an Automation tree.
   [nocompile, noinline_doc] dictionary AutomationNode {
     // The root node of the tree containing this AutomationNode.
@@ -449,6 +454,9 @@
     // The target of an in-page link.
     AutomationNode? inPageLinkTarget;
 
+    // An array of custom actions.
+    CustomAction[]? customActions;
+
     //
     // Link attributes.
     //
@@ -722,6 +730,9 @@
     // Scrolls this node to make it visible.
     static void makeVisible();
 
+    // Performs custom action.
+    static void performCustomAction(long customActionId);
+
     // Sets selection within a text field.
     static void setSelection(long startIndex, long endIndex);