Add custom action support

chrome/common/extensions/api/automation_internal.idl

Index: chrome/common/extensions/api/automation_internal.idl
diff --git a/chrome/common/extensions/api/automation_internal.idl b/chrome/common/extensions/api/automation_internal.idl
index a5cc24f88eec66a13ada0ff568b869e7aaa61b42..68cf1f18e3a8eb06d3a10dc0d4868144d7170388 100644
--- a/chrome/common/extensions/api/automation_internal.idl
+++ b/chrome/common/extensions/api/automation_internal.idl
@@ -29,8 +29,9 @@ namespace automationInternal {
 
   // All possible actions that can be performed on automation nodes.
   enum ActionType {
-    focus,
+    customAction,
     doDefault,
+    focus,
     getImageData,
     hitTest,
     makeVisible,
@@ -38,10 +39,10 @@ namespace automationInternal {
     setAccessibilityFocus,
     setSequentialFocusNavigationStartingPoint,
     setSelection,
+    showContextMenu,
     startDuckingMedia,
     stopDuckingMedia,
-    suspendMedia,
-    showContextMenu
+    suspendMedia
   };
 
   // Arguments required for all actions supplied to performAction.
@@ -51,6 +52,12 @@ namespace automationInternal {
     ActionType actionType;
   };
 
+  // Arguments for the customAction action. Those args are passed to
+  // performAction as opt_args.
+  dictionary PerformCustomActionParams {
+    long customActionID;
+  };
+
   // Arguments for the setSelection action supplied to performAction.
   dictionary SetSelectionParams {
     // Reuses ActionRequiredParams automationNodeID to mean anchor node id,