clang/win: Enable -Wunused-local-typedef

third_party/harfbuzz-ng/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 
 # The GYP build supports system harfbuzz for non-official builds when using
 # pangoft2 1.31.0 or greater (which pulls it in).
@@ skipping 126 matching lines @@
 
     defines = [
       "HAVE_OT",
       "HAVE_ICU",
       "HAVE_ICU_BUILTIN",
       "HB_NO_MT",
     ]
 
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
+
+    config("harfbuzz_warnings") {
+      cflags = []
+      if (is_clang) {
+        cflags += [
+          "-Wno-unused-value",
+          # Harfbuzz uses unused typedefs for its static asserts (and its
+          # static asserts are strange enough that they can't be replaced
+          # by static_assert).
+          "-Wno-unused-local-typedef",
+        ]
+      }
+      if (is_win) {
+        cflags += [ "/wd4334" ]  # Result of 32-bit shift implicitly converted to 64 bits.
+      }
+    }
+    configs += [ ":harfbuzz_warnings" ]
+
     public_configs = [ ":harfbuzz-ng_config" ]
 
     deps = [
       "//third_party/icu:icuuc",
     ]
 
-    cflags = []
-    if (is_clang) {
-      cflags += [ "-Wno-unused-value" ]
-    }
-    if (is_win) {
-      cflags += [ "/wd4334" ]  # Result of 32-bit shift implicitly converted to 64 bits.
-    }
     if (is_mac) {
       sources += [
         "src/hb-coretext.cc",
         "src/hb-coretext.h",
       ]
       defines += [ "HAVE_CORETEXT" ]
     }
 
     # When without -fvisibility=hidden for pango to use the harfbuzz
     # in the tree, all symbols pango needs must be included, or
@@ skipping 19 matching lines @@
       if (is_linux && use_pango && !is_chromeos && !is_official_build &&
           current_cpu != "arm" && !is_component_build) {
         # These symbols are referenced from libpangoft2, which will be
         # dynamically linked later.
         ldflags =
             [ "-Wl,-uhb_ft_face_create_cached,-uhb_glib_get_unicode_funcs" ]
       }
     }
   }
 }