HTML exit reader view button

ios/chrome/browser/dom_distiller/distiller_viewer.cc

 // Copyright 2015 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.
 
 #include "ios/chrome/browser/dom_distiller/distiller_viewer.h"
 
 #include <string>
 
 #include "components/dom_distiller/core/distilled_page_prefs.h"
 #include "components/dom_distiller/core/dom_distiller_request_view_base.h"
@@ skipping 31 matching lines @@
 
 void DistillerViewer::OnArticleReady(
     const dom_distiller::DistilledArticleProto* article_proto) {
   DomDistillerRequestViewBase::OnArticleReady(article_proto);
 
   const std::string html = viewer::GetUnsafeArticleTemplateHtml(
       url_.spec(), distilled_page_prefs_->GetTheme(),
       distilled_page_prefs_->GetFontFamily());
 
   std::string html_and_script(html);
-  std::string hide_feedback =
-      "document.getElementById('feedbackContainer').style.display = 'none';";
-  html_and_script += "<script>" + js_buffer_ + hide_feedback + "</script>";
+  html_and_script +=
+      "<script> distiller_on_ios = true; " + js_buffer_ + "</script>";
   callback_.Run(url_, html_and_script);
 }
 
 void DistillerViewer::SendJavaScript(const std::string& buffer) {
   js_buffer_ += buffer;
 }
 
 }  // namespace dom_distiller