Implement aria-placeholder

components/test_runner/web_ax_object_proxy.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 COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_
 #define COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 174 matching lines @@
   std::string NameFrom();
   int NameElementCount();
   v8::Local<v8::Object> NameElementAtIndex(unsigned index);
 
   std::string Description();
   std::string DescriptionFrom();
   int MisspellingsCount();
   int DescriptionElementCount();
   v8::Local<v8::Object> DescriptionElementAtIndex(unsigned index);
 
+  std::string Placeholder();
+
   blink::WebAXObject accessibility_object_;
   Factory* factory_;
 
   v8::Persistent<v8::Function> notification_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(WebAXObjectProxy);
 };
 
 class RootWebAXObjectProxy : public WebAXObjectProxy {
  public:
@@ skipping 16 matching lines @@
   v8::Local<v8::Object> GetOrCreate(const blink::WebAXObject&) override;
 
  private:
   typedef v8::PersistentValueVector<v8::Object> ElementList;
   ElementList elements_;
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_