Update existing uses of /wd4267 to use the GN config

third_party/re2/BUILD.gn

Index: third_party/re2/BUILD.gn
diff --git a/third_party/re2/BUILD.gn b/third_party/re2/BUILD.gn
index d022e4f9e03c8780cd489da9b923b307891edf7f..656e5cf2e4e461c2c6dee2ca7520b1944fff8781 100644
--- a/third_party/re2/BUILD.gn
+++ b/third_party/re2/BUILD.gn
@@ -58,7 +58,11 @@ static_library("re2") {
   ]
 
   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 = [ ":re2_config" ]
 
   deps = [
@@ -67,10 +71,7 @@ static_library("re2") {
 
   if (is_win) {
     include_dirs = [ "mswin" ]
-    cflags = [
-      "/wd4267",  # Conversion from size_t.
-      "/wd4722",  # Destructor never terminates.
-    ]
+    cflags = [ "/wd4722" ]  # Destructor never terminates.
   } else {
     sources -= [ "mswin/stdint.h" ]
   }