Gcc build fix.

Add missing namespace on stream::Source and stream::Sink.
I'm not sure why this doesn't cause an error on clang or MSVC,
but it does on gcc 13.3.0.

Change-Id: I54b570a4df84725c0201843cc42b903f4b08c2b8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/245554
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
diff --git a/src/dawn/native/TintUtils.h b/src/dawn/native/TintUtils.h
index d8f83e1..fe26099 100644
--- a/src/dawn/native/TintUtils.h
+++ b/src/dawn/native/TintUtils.h
@@ -57,10 +57,10 @@
     requires(tint::HasReflection<T>)
 class stream::Stream<T> {
   public:
-    static void Write(Sink* s, const T& v) {
+    static void Write(stream::Sink* s, const T& v) {
         tint::ForeachField(v, [&](const auto& f) { StreamIn(s, f); });
     }
-    static MaybeError Read(Source* s, T* v) {
+    static MaybeError Read(stream::Source* s, T* v) {
         MaybeError error = {};
         tint::ForeachField(*v, [&](auto& f) {
             if (!error.IsError()) {