Add initial support for native Linux desktop notifications

chrome/common/chrome_features.cc

 // Copyright 2016 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/common/chrome_features.h"
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "extensions/features/features.h"
 #include "ppapi/features/features.h"
@@ skipping 186 matching lines @@
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 
 #if defined(OS_WIN)
 // Enables or disables the ModuleDatabase backend for the conflicts UI.
 const base::Feature kModuleDatabase{"ModuleDatabase",
                                     base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
 
 // Enables the use of native notification centers instead of using the Message
 // Center for displaying the toasts.
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
 const base::Feature kNativeNotifications{"NativeNotifications",
                                          base::FEATURE_DISABLED_BY_DEFAULT};
-#endif  // defined(OS_MACOSX)
+#endif  // defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
 
 // If enabled, the list of content suggestions on the New Tab page will contain
 // pages that the user downloaded for later use.
 const base::Feature kOfflinePageDownloadSuggestionsFeature{
     "NTPOfflinePageDownloadSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enables Permissions Blacklisting via Safe Browsing.
 const base::Feature kPermissionsBlacklist{
     "PermissionsBlacklist", base::FEATURE_DISABLED_BY_DEFAULT};
 
@@ skipping 96 matching lines @@
   return base::FeatureList::IsEnabled(features::kPrefService) ||
 #if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
          base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
              switches::kMusConfig) == switches::kMash;
 #else
          false;
 #endif
 }
 
 }  // namespace features