Implement AutomationNode.querySelector().

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 2c48253a86f695ee4cf2d8bf473f5cb6924041dc..73611cb650bdb0e6a92649a871c86435605cb2b4 100644
--- a/chrome/common/extensions/api/automation.idl
+++ b/chrome/common/extensions/api/automation.idl
@@ -220,6 +220,14 @@
     long height;
   };
 
+  // The parameters for a <code>query</code>.
+  dictionary QueryInfo {
+    DOMString? querySelector;
+  };
+
+  // Called when the result for a <code>query</code> is available.
+  callback QueryCallback = void(AutomationNode node);
+
   // An event in the Automation tree.
   [nocompile, noinline_doc] dictionary AutomationEvent {
     // The $(ref:automation.AutomationNode) to which the event was targeted.
@@ -292,6 +300,10 @@
     // Removes a listener for the given event type and event phase.
     static void removeEventListener(
         EventType eventType, AutomationListener listener, boolean capture);
+
+    // Gets the first node in this node's subtree which matches the query specified

[Devlin, 2014/10/29 21:23:43]

more than 80 characters

[aboxhall, 2014/10/30 18:34:18]

Done.

+    // in <code>info</code>.
+    static void query(QueryInfo info, QueryCallback callback);
   };
 
   // Called when the <code>AutomationRootNode</code> for the page is available.