Add histograms for notices about other forms of browsing history

chrome/browser/ui/webui/options/clear_browser_data_handler.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/webui/options/clear_browser_data_handler.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 332 matching lines @@
       prefs->GetBoolean(prefs::kDeleteBrowsingHistory) &&
       // 3. The notice has been shown less than |kMaxTimesHistoryNoticeShown|.
       notice_shown_times < kMaxTimesHistoryNoticeShown;
 
   if (show_notice) {
     // Increment the preference.
     prefs->SetInteger(prefs::kClearBrowsingDataHistoryNoticeShownTimes,
                       notice_shown_times + 1);
   }
 
+  UMA_HISTOGRAM_BOOLEAN(
+      "History.ClearBrowsingData.ShownHistoryNoticeAfterClearing", show_notice);
+
   web_ui()->CallJavascriptFunction(
       "ClearBrowserDataOverlay.doneClearing",
       base::FundamentalValue(show_notice));
 }
 
 void ClearBrowserDataHandler::OnBrowsingHistoryPrefChanged() {
   web_ui()->CallJavascriptFunction(
       "ClearBrowserDataOverlay.setAllowDeletingHistory",
       base::FundamentalValue(*allow_deleting_browser_history_));
 }
@@ skipping 43 matching lines @@
         sync_service_,
         WebHistoryServiceFactory::GetForProfile(Profile::FromWebUI(web_ui())),
         base::Bind(&ClearBrowserDataHandler::UpdateHistoryDeletionDialog,
                    weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
 void ClearBrowserDataHandler::UpdateHistoryNotice(bool show) {
   should_show_history_notice_ = show;
   OnStateChanged();
+
+  UMA_HISTOGRAM_BOOLEAN(
+      "History.ClearBrowsingData.HistoryNoticeShownInFooterWhenUpdated",
+      should_show_history_notice_);
 }
 
 void ClearBrowserDataHandler::UpdateHistoryDeletionDialog(bool show) {
   // This is used by OnBrowsingDataRemoverDone (when the deletion finishes).
   should_show_history_deletion_dialog_ = show;
 }
 
 }  // namespace options