Add timestamp support to the Previews infobar

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 "base/callback.h"
 #include "base/strings/string16.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
@@ skipping 33 matching lines @@
   ~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,
       bool is_data_saver_user,
       const OnDismissPreviewsInfobarCallback& on_dismiss_callback);
 
+  // ConfirmInfoBarDelegate overrides:
+  base::string16 GetMessageText() const override;
+  base::string16 GetLinkText() const override;
+
+  base::string16 GetTimestampText() const;
+
  private:
   PreviewsInfoBarDelegate(
       content::WebContents* web_contents,
       PreviewsInfoBarType infobar_type,
       bool is_data_saver_user,
       const OnDismissPreviewsInfobarCallback& on_dismiss_callback);
 
+#if defined(OS_ANDROID)
+  // Returns a Previews infobar that owns |delegate|.
+  static std::unique_ptr<infobars::InfoBar> CreateInfoBar(

[RyanSturm, 2017/05/08 20:48:17]

Why is this declared here and defined in 
chrome/browser/ui/android/infobars/previews_infobar.cc?

[megjablon, 2017/05/08 22:49:19]

This is the pattern used by infobars and infobar delegates. dfalcantara@ can you
comment on why? I moved this to PreviewsInfobar now.

+      infobars::InfoBarManager* infobar_manager,
+      std::unique_ptr<PreviewsInfoBarDelegate> delegate);
+#endif
+
   // 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_;
   mutable PreviewsInfoBarAction infobar_dismissed_action_;
 
   const base::string16 message_text_;
 
   OnDismissPreviewsInfobarCallback on_dismiss_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PreviewsInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_PREVIEWS_PREVIEWS_INFOBAR_DELEGATE_H_