Drop cfi support

build/bromite.gn_args

@@ -26,7 +26,6 @@ enable_vr=false
 exclude_unwind_tables=false
 ffmpeg_branding="Chrome"
 icu_use_data_file=true
-is_cfi=true
 is_component_build=false
 is_debug=false
 is_official_build=true
@@ -36,7 +35,6 @@ symbol_level=1
 system_webview_package_name="org.bromite.webview"
 target_os="android"
 treat_warnings_as_errors=true
-use_cfi_cast=true
 use_debug_fission=true
 use_errorprone_java_compiler=false
 use_gnome_keyring=false

build/bromite_patches_list.txt

@@ -204,7 +204,6 @@ Add-kill-switch-for-unsupported-clangd-flags.patch
 00WIN-Add-some-prefs-to-secure-preferences.patch
 00WIN-Disable-search-for-image.patch
 
-00Remove-experimental-relative-c---abi-vtables.patch
 AudioBuffer-AnalyserNode-fp-mitigations.patch
 00Disable-Component-Updates.patch
 00add-browser-policy.patch

build/patches/00Remove-experimental-relative-c---abi-vtables.patch

@@ -1,28 +0,0 @@
-From: uazo <uazo@users.noreply.github.com>
-Date: Mon, 30 Jan 2023 15:20:53 +0000
-Subject: Remove experimental-relative-c++-abi-vtables
-
-although it is really interesting, it breaks execution with CFI active
-
-License: GPL-2.0-or-later - https://spdx.org/licenses/GPL-2.0-or-later.html
----
- build/config/compiler/BUILD.gn | 5 -----
- 1 file changed, 5 deletions(-)
-
-diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
---- a/build/config/compiler/BUILD.gn
-+++ b/build/config/compiler/BUILD.gn
-@@ -681,11 +681,6 @@ config("compiler") {
-     cflags_cc += [ "-Wno-trigraphs" ]
-   }
- 
--  if (use_relative_vtables_abi) {
--    cflags_cc += [ "-fexperimental-relative-c++-abi-vtables" ]
--    ldflags += [ "-fexperimental-relative-c++-abi-vtables" ]
--  }
--
-   # Add flags for link-time optimization. These flags enable
-   # optimizations/transformations that require whole-program visibility at link
-   # time, so they need to be applied to all translation units, and we may end up
---
-2.25.1

tools/images/bromite-build/build_args.gni

@@ -31,14 +31,8 @@ if (target_os == "android") {
     symbol_level = 1
     strip_debug_info = false
     generate_linker_map = false
-
-    # since is_cfi require use_thin_lto
-    # but not work in debug mode
-    is_cfi = false # disable it
-    use_cfi_cast = false # disable it
   } else {
     generate_linker_map = true
-    use_relative_vtables_abi = false
   }
 }