Add picker view for Web Share Target.

chrome/browser/webshare/share_service_impl.h

 // Copyright 2016 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_WEBSHARE_SHARE_SERVICE_IMPL_H_
 #define CHROME_BROWSER_WEBSHARE_SHARE_SERVICE_IMPL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 30 matching lines @@
   // "text", and "url", with an empty string, for forwards compatibility.
   // Returns false, if there are badly nested placeholders.
   // This includes any case in which two "{" occur before a "}", or a "}"
   // occurs with no preceding "{".
   static bool ReplacePlaceholders(base::StringPiece url_template,
                                   base::StringPiece title,
                                   base::StringPiece text,
                                   const GURL& share_url,
                                   std::string* url_template_filled);
 
+  void OnPickerClosed(const std::string& title,
+                      const std::string& text,
+                      const GURL& share_url,
+                      const ShareCallback& callback,
+                      bool picked);
+
   DISALLOW_COPY_AND_ASSIGN(ShareServiceImpl);
 };
 
 #endif  // CHROME_BROWSER_WEBSHARE_SHARE_SERVICE_IMPL_H_