Update existing uses of /wd4267 to use the GN config

third_party/harfbuzz-ng/BUILD.gn

Index: third_party/harfbuzz-ng/BUILD.gn
diff --git a/third_party/harfbuzz-ng/BUILD.gn b/third_party/harfbuzz-ng/BUILD.gn
index 000a9cc361e338973203417895bb6dd993ed4164..ee0cda0c7b25d45301c2f61500fb2864a559af60 100644
--- a/third_party/harfbuzz-ng/BUILD.gn
+++ b/third_party/harfbuzz-ng/BUILD.gn
@@ -149,7 +149,11 @@ if (use_system_harfbuzz) {
     ]
 
     configs -= [ "//build/config/compiler:chromium_code" ]
-    configs += [ "//build/config/compiler:no_chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+      "//build/config/compiler:no_size_t_to_int_warning",
+    ]
     public_configs = [ ":harfbuzz-ng_config" ]
 
     deps = [
@@ -162,7 +166,6 @@ if (use_system_harfbuzz) {
     }
     if (is_win) {
       cflags += [
-        "/wd4267",  # size_t to 'type' converion.
         "/wd4334",  # Result of 32-bit shift implicitly converted to 64 bits.
       ]
     }