Update existing uses of /wd4267 to use the GN config

third_party/libexif/BUILD.gn

Index: third_party/libexif/BUILD.gn
diff --git a/third_party/libexif/BUILD.gn b/third_party/libexif/BUILD.gn
index b2b4feda061ddf0c1324d91eca62aeadccd18df9..a67566142e2ff3fd5ed9bd9d447233cadb5b3235 100644
--- a/third_party/libexif/BUILD.gn
+++ b/third_party/libexif/BUILD.gn
@@ -53,7 +53,6 @@ if (!is_linux || is_chromeos) {
 
       cflags = [
         "/wd4018",  # size/unsigned mismatch
-        "/wd4267",  # size_t -> ExifLong truncation on amd64
       ]
 
       # TODO(GYP): Handle /analyze switch, when it will be used in GN.
@@ -62,7 +61,11 @@ if (!is_linux || is_chromeos) {
     }
 
     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 = [ ":libexif_config" ]
   }