Add helper to open URL in new activity

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 0acff675365b418e9eda1ef58bdbd6849381c99d..32e0496cec650234d872097532ff1a20c04241b8 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3102,6 +3102,8 @@ split_static_library("browser") {
       "android/ntp/new_tab_page_prefs.h",
       "android/ntp/new_tab_page_url_handler.cc",
       "android/ntp/new_tab_page_url_handler.h",
+      "android/ntp/notification_helper.cc",
+      "android/ntp/notification_helper.h",
       "android/ntp/ntp_snippets_bridge.cc",
       "android/ntp/ntp_snippets_bridge.h",
       "android/ntp/ntp_snippets_launcher.cc",
@@ -3968,6 +3970,7 @@ if (android_java_ui) {
       "../android/java/src/org/chromium/chrome/browser/ntp/ForeignSessionHelper.java",
       "../android/java/src/org/chromium/chrome/browser/ntp/LogoBridge.java",
       "../android/java/src/org/chromium/chrome/browser/ntp/NewTabPagePrefs.java",
+      "../android/java/src/org/chromium/chrome/browser/ntp/NotificationHelper.java",
       "../android/java/src/org/chromium/chrome/browser/ntp/RecentlyClosedBridge.java",
       "../android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java",
       "../android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsLauncher.java",