Adding opt out and previews type information to DRP pingback

chrome/browser/previews/previews_infobar_tab_helper.h

Index: chrome/browser/previews/previews_infobar_tab_helper.h
diff --git a/chrome/browser/previews/previews_infobar_tab_helper.h b/chrome/browser/previews/previews_infobar_tab_helper.h
index 512726f127512966e6d584d7c32d679b052af916..949ac7ea2f1ca34720c005d7ba8d9b2c7d3d9142 100644
--- a/chrome/browser/previews/previews_infobar_tab_helper.h
+++ b/chrome/browser/previews/previews_infobar_tab_helper.h
@@ -6,6 +6,8 @@
 #define CHROME_BROWSER_PREVIEWS_PREVIEWS_INFOBAR_TAB_HELPER_H_
 
 #include "base/macros.h"
+#include "base/optional.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_pingback_client.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
@@ -29,19 +31,35 @@ class PreviewsInfoBarTabHelper
     displayed_preview_infobar_ = displayed;
   }
 
+  // The data saver page identifier of the current page load.
+  const base::Optional<data_reduction_proxy::NavigationID>&
+  committed_data_saver_navigation_id() {
+    return committed_data_saver_navigation_id_;
+  }
+
  private:
   friend class content::WebContentsUserData<PreviewsInfoBarTabHelper>;
   friend class PreviewsInfoBarTabHelperUnitTest;
 
   explicit PreviewsInfoBarTabHelper(content::WebContents* web_contents);
 
+  // Clears the last navigation from this tab in the pingback client.
+  void ClearLastNavigationAsync() const;
+
   // Overridden from content::WebContentsObserver:
   void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override;
 
+  // Stored for use in the destructor.
+  content::BrowserContext* browser_context_;
+
   // True if the InfoBar for a preview has been shown for the page.
   bool displayed_preview_infobar_;
 
+  // The data saver page identifier of the current page load.
+  base::Optional<data_reduction_proxy::NavigationID>
+      committed_data_saver_navigation_id_;
+
   DISALLOW_COPY_AND_ASSIGN(PreviewsInfoBarTabHelper);
 };