build.patch

diff --git a/build/config/compiler/pgo/BUILD.gn b/build/config/compiler/pgo/BUILD.gn
index f8293b2ef03f9..97e985cecc374 100644
--- a/build/config/compiler/pgo/BUILD.gn
+++ b/build/config/compiler/pgo/BUILD.gn
@@ -127,21 +127,21 @@ config("pgo_optimization_flags") {
       # and at least some profile data always ends up being considered
       # out of date, so make sure we don't error for those cases.
       "-Wno-profile-instr-unprofiled",
       "-Wno-profile-instr-out-of-date",
 
       # Some hashing conflict results in a lot of warning like this when doing
       # a PGO build:
       #   warning: foo.cc: Function control flow change detected (hash mismatch)
       #   [-Wbackend-plugin]
       # See https://crbug.com/978401
-      "-Wno-backend-plugin",
+      #"-Wno-backend-plugin",
     ]
 
     # Enable basic block layout based on the extended TSP problem. This aims to
     # improve icache utilization and reduce the binary size.
     if (use_thin_lto) {
       if (is_win) {
         ldflags = [ "-mllvm:-enable-ext-tsp-block-placement=1" ]
       } else {
         ldflags = [ "-Wl,-mllvm,-enable-ext-tsp-block-placement=1" ]
       }