MD History: Delete button in the toolbar allows deletion of multiple history-items.

chrome/browser/ui/webui/md_history_ui.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 "chrome/browser/ui/webui/md_history_ui.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/browsing_history_handler.h"
 #include "chrome/browser/ui/webui/metrics_handler.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
+#include "components/prefs/pref_service.h"
 #include "components/search/search.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/browser_resources.h"
 #include "grit/components_scaled_resources.h"
 #include "grit/components_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 
 #if !defined(OS_ANDROID)
 #include "chrome/browser/ui/webui/foreign_session_handler.h"
 #include "chrome/browser/ui/webui/history_login_handler.h"
 #endif
 
 namespace {
 
-content::WebUIDataSource* CreateMdHistoryUIHTMLSource() {
+content::WebUIDataSource* CreateMdHistoryUIHTMLSource(Profile* profile) {
+  PrefService* prefs = profile->GetPrefs();
+
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIHistoryHost);
 
   // Localized strings (alphabetical order).
   source->AddLocalizedString("clearSearch", IDS_MD_HISTORY_CLEAR_SEARCH);
   source->AddLocalizedString("cancel", IDS_CANCEL);
   source->AddLocalizedString("delete", IDS_MD_HISTORY_DELETE);
   source->AddLocalizedString("itemsSelected", IDS_MD_HISTORY_ITEMS_SELECTED);
   source->AddLocalizedString("moreFromSite", IDS_HISTORY_MORE_FROM_SITE);
   source->AddLocalizedString("removeFromHistory", IDS_HISTORY_REMOVE_PAGE);
   source->AddLocalizedString("search", IDS_MD_HISTORY_SEARCH);
   source->AddLocalizedString("title", IDS_HISTORY_TITLE);
 
+  bool allow_deleting_history =
+      prefs->GetBoolean(prefs::kAllowDeletingBrowserHistory);
+  source->AddBoolean("allowDeletingHistory", allow_deleting_history);
+
   source->AddResourcePath("history_card.html",
                           IDR_MD_HISTORY_HISTORY_CARD_HTML);
   source->AddResourcePath("history_card.js", IDR_MD_HISTORY_HISTORY_CARD_JS);
   source->AddResourcePath("history_card_manager.html",
                           IDR_MD_HISTORY_HISTORY_CARD_MANAGER_HTML);
   source->AddResourcePath("history_card_manager.js",
                           IDR_MD_HISTORY_HISTORY_CARD_MANAGER_JS);
   source->AddResourcePath("history_item.html",
                           IDR_MD_HISTORY_HISTORY_ITEM_HTML);
   source->AddResourcePath("history_item.js", IDR_MD_HISTORY_HISTORY_ITEM_JS);
@@ skipping 17 matching lines @@
 
   // On mobile we deal with foreign sessions differently.
 #if !defined(OS_ANDROID)
   if (search::IsInstantExtendedAPIEnabled()) {
     web_ui->AddMessageHandler(new browser_sync::ForeignSessionHandler());
     web_ui->AddMessageHandler(new HistoryLoginHandler());
   }
 #endif
 
   Profile* profile = Profile::FromWebUI(web_ui);
-  content::WebUIDataSource::Add(profile, CreateMdHistoryUIHTMLSource());
+  content::WebUIDataSource::Add(profile, CreateMdHistoryUIHTMLSource(profile));
 }
 
 MdHistoryUI::~MdHistoryUI() {}
 
 base::RefCountedMemory* MdHistoryUI::GetFaviconResourceBytes(
     ui::ScaleFactor scale_factor) {
   return ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
       IDR_HISTORY_FAVICON, scale_factor);
 }