Don't display a settings button for extension notifications

chrome/browser/notifications/notification_platform_bridge_linux.cc

 // Copyright 2017 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/notifications/notification_platform_bridge_linux.h"
 
 #include <algorithm>
 #include <memory>
 #include <set>
 #include <sstream>
@@ skipping 561 matching lines @@
         const std::string label = base::UTF16ToUTF8(button_info.title);
         actions.push_back(id);
         actions.push_back(label);
       }
       if (notification->clickable()) {
         // Special case: the pair ("default", "") will not add a button,
         // but instead makes the entire notification clickable.
         actions.push_back(kDefaultButtonId);
         actions.push_back("");
       }
-      // Always add a settings button.
-      actions.push_back(kSettingsButtonId);
-      actions.push_back(
-          l10n_util::GetStringUTF8(IDS_NOTIFICATION_BUTTON_SETTINGS));
+      // Always add a settings button for web notifications.
+      if (notification_type != NotificationCommon::EXTENSION) {
+        actions.push_back(kSettingsButtonId);
+        actions.push_back(
+            l10n_util::GetStringUTF8(IDS_NOTIFICATION_BUTTON_SETTINGS));
+      }
     }
     writer.AppendArrayOfStrings(actions);
 
     dbus::MessageWriter hints_writer(nullptr);
     writer.OpenArray("{sv}", &hints_writer);
     dbus::MessageWriter urgency_writer(nullptr);
     hints_writer.OpenDictEntry(&urgency_writer);
     urgency_writer.AppendString("urgency");
     urgency_writer.AppendVariantOfUint32(
         NotificationPriorityToFdoUrgency(notification->priority()));
@@ skipping 307 matching lines @@
 }
 
 void NotificationPlatformBridgeLinux::SetReadyCallback(
     NotificationBridgeReadyCallback callback) {
   impl_->SetReadyCallback(std::move(callback));
 }
 
 void NotificationPlatformBridgeLinux::CleanUp() {
   impl_->CleanUp();
 }