Build: disable CFI when LTO is disabled

build/config/sanitizers/sanitizers.gni

Index: build/config/sanitizers/sanitizers.gni
diff --git a/build/config/sanitizers/sanitizers.gni b/build/config/sanitizers/sanitizers.gni
index 8b933fd38eeb7a880d578407f0f89b1d2562d3df..881ea32bf606d6dea1bc9a5d1c7101c8a10c018f 100644
--- a/build/config/sanitizers/sanitizers.gni
+++ b/build/config/sanitizers/sanitizers.gni
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
+import("//build/toolchain/toolchain.gni")
 
 declare_args() {
   # Compile for Address Sanitizer to find memory bugs.
@@ -54,7 +55,7 @@ declare_args() {
   #
   # TODO(pcc): Remove this flag if/when CFI is enabled in all official builds.
   is_cfi = target_os == "linux" && !is_chromeos && target_cpu == "x64" &&
-           is_chrome_branded && is_official_build
+           is_chrome_branded && is_official_build && allow_posix_link_time_opt
 
   # Enable checks for bad casts: derived cast and unrelated cast.
   # TODO(krasin): remove this, when we're ready to add these checks by default.