Previews infobar tests

chrome/browser/previews/previews_infobar_delegate.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_PREVIEWS_PREVIEWS_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_PREVIEWS_PREVIEWS_INFOBAR_DELEGATE_H_
 
 #include "components/infobars/core/confirm_infobar_delegate.h"
 
 namespace content {
 class WebContents;
 }
 
 // Shows an infobar that lets the user know that a preview page has been loaded,
 // and gives the user a link to reload the original page. This infobar will only
 // be shown once per page load. Records UMA data for user interactions with the
 // infobar.
 class PreviewsInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
   // The type of the infobar. It controls the strings and what UMA data is
   // recorded for the infobar.
   enum PreviewsInfoBarType {
     LOFI,      // Server-side image replacement.
     LITE_PAGE, // Server-side page rewrite.
     OFFLINE,   // Offline copy of the page.
   };
 
+  // Actions on the previews infobar. This enum must remain synchronized with
+  // the enum of the same name in metrics/histograms/histograms.xml.
+  enum PreviewsInfoBarAction {
+    INFOBAR_SHOWN = 0,
+    INFOBAR_LOAD_ORIGINAL_CLICKED = 1,
+    INFOBAR_DISMISSED_BY_USER = 2,
+    INFOBAR_DISMISSED_BY_NAVIGATION = 3,
+    INFOBAR_INDEX_BOUNDARY
+  };
+
   ~PreviewsInfoBarDelegate() override;
 
   // Creates a preview infobar and corresponding delegate and adds the infobar
   // to InfoBarService.
   static void Create(content::WebContents* web_contents,
                      PreviewsInfoBarType infobar_type);
 
  private:
   PreviewsInfoBarDelegate(content::WebContents* web_contents,
                           PreviewsInfoBarType infobar_type);
 
   // ConfirmInfoBarDelegate overrides:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   bool ShouldExpire(const NavigationDetails& details) const override;
   void InfoBarDismissed() override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   base::string16 GetLinkText() const override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
   PreviewsInfoBarType infobar_type_;
 
   DISALLOW_COPY_AND_ASSIGN(PreviewsInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_PREVIEWS_PREVIEWS_INFOBAR_DELEGATE_H_