Fix build break for Win64 bot.

extensions/browser/api/printer_provider_internal/BUILD.gn

Index: extensions/browser/api/printer_provider_internal/BUILD.gn
diff --git a/extensions/browser/api/printer_provider_internal/BUILD.gn b/extensions/browser/api/printer_provider_internal/BUILD.gn
index 780ba4a0278a87de8e3287fe117393750f2a2d64..22deb5f2006190ae3c271d9396aa650dae808a64 100644
--- a/extensions/browser/api/printer_provider_internal/BUILD.gn
+++ b/extensions/browser/api/printer_provider_internal/BUILD.gn
@@ -9,6 +9,11 @@ source_set("printer_provider_internal") {
     "printer_provider_internal_api_observer.h",
   ]
 
+  configs += [
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
+
   deps = [
     "//content/public/browser",
     "//extensions/common/api",