Implement AutomationNode.querySelector().

chrome/browser/extensions/api/automation_internal/automation_internal_api.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_INTERNAL_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_INTERNAL_API_H_
 
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
@@ skipping 50 matching lines @@
 class AutomationInternalEnableDesktopFunction
     : public UIThreadExtensionFunction {
   DECLARE_EXTENSION_FUNCTION("automationInternal.enableDesktop",
                              AUTOMATIONINTERNAL_ENABLEDESKTOP)
  protected:
   ~AutomationInternalEnableDesktopFunction() override {}
 
   ResponseAction Run() override;
 };
 
+class AutomationInternalQuerySelectorFunction
+    : public UIThreadExtensionFunction {
+  DECLARE_EXTENSION_FUNCTION("automationInternal.querySelector",
+                             AUTOMATIONINTERNAL_ENABLEDESKTOP)
+
+ public:
+  typedef base::Callback<void(const std::string& error,
+                              int result_acc_obj_id)> Callback;
+
+ protected:
+  virtual ~AutomationInternalQuerySelectorFunction() {}
+
+  virtual ResponseAction Run() override;
+
+ private:
+  void OnResponse(const std::string& error, int result_acc_obj_id);
+
+  // Used for assigning a unique ID to each request so that the response can be
+  // routed appropriately.
+  static int query_request_id_counter_;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_INTERNAL_API_H_