Enabled chromium's download bubble features by default

fix brave/brave-browser#28562

Author: simonhong

app/brave_main_delegate_browsertest.cc

@@ -50,6 +50,7 @@
 #include "chrome/browser/ui/profile_picker.h"
 #include "chrome/browser/ui/ui_features.h"
 #include "chrome/test/base/in_process_browser_test.h"
+#include "components/safe_browsing/core/common/features.h"
 #include "components/translate/core/common/translate_util.h"
 #include "extensions/common/extension_features.h"
 #endif
@@ -214,6 +215,8 @@ IN_PROC_BROWSER_TEST_F(BraveMainDelegateBrowserTest, EnabledFeatures) {
     &features::kWinrtGeolocationImplementation,
 #endif
 #if !BUILDFLAG(IS_ANDROID)
+    &safe_browsing::kDownloadBubble,
+    &safe_browsing::kDownloadBubbleV2,
     &sharing_hub::kDesktopScreenshots,
 #endif
     &media::kEnableTabMuting,

chromium_src/components/safe_browsing/core/common/features.cc

@@ -0,0 +1,21 @@
+/* Copyright (c) 2023 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#include "src/components/safe_browsing/core/common/features.cc"
+
+#include "base/feature_override.h"
+#include "build/build_config.h"
+
+namespace safe_browsing {
+
+// Download bubble is desktop only feature.
+#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
+OVERRIDE_FEATURE_DEFAULT_STATES({{
+    {kDownloadBubble, base::FEATURE_ENABLED_BY_DEFAULT},
+    {kDownloadBubbleV2, base::FEATURE_ENABLED_BY_DEFAULT},
+}});
+#endif
+
+}  // namespace safe_browsing