Update existing uses of /wd4267 to use the GN config

storage/browser/BUILD.gn

Index: storage/browser/BUILD.gn
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index 42e6a99497253fc329a0224fd6c0c504c2d0a6ac..61e76c7aef5bf6173b52b3c6d6e9c14bc5af6fb7 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -170,10 +170,11 @@ component("browser") {
   ]
 
   defines = [ "STORAGE_BROWSER_IMPLEMENTATION" ]
-  configs += [ "//build/config/compiler:wexit_time_destructors" ]
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): fix size_t to int truncations.
-  }
+  configs += [
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 
   deps = [
     "//base",