Bug: None: Fix GCC 11 compilation issue

Change-Id: I5678729ebe00b8359df43d18d0b1dd003b46b496
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/249454
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: David Neto <dneto@google.com>

src/dawn/native/TintUtils.h

diff --git a/src/dawn/native/TintUtils.h b/src/dawn/native/TintUtils.h
index fe26099..b1d241e 100644
--- a/src/dawn/native/TintUtils.h
+++ b/src/dawn/native/TintUtils.h
@@ -52,15 +52,16 @@
 std::unordered_map<tint::OverrideId, double> BuildSubstituteOverridesTransformConfig(
     const ProgrammableStage& stage);
 
+namespace stream {
 // Uses tint::ForeachField when available to implement the stream::Stream trait for types.
 template <typename T>
     requires(tint::HasReflection<T>)
-class stream::Stream<T> {
+class Stream<T> {
   public:
-    static void Write(stream::Sink* s, const T& v) {
+    static void Write(Sink* s, const T& v) {
         tint::ForeachField(v, [&](const auto& f) { StreamIn(s, f); });
     }
-    static MaybeError Read(stream::Source* s, T* v) {
+    static MaybeError Read(Source* s, T* v) {
         MaybeError error = {};
         tint::ForeachField(*v, [&](auto& f) {
             if (!error.IsError()) {
@@ -70,6 +71,7 @@
         return error;
     }
 };
+}  // namespace stream
 
 constexpr tint::BindingPoint ToTint(const BindingSlot& slot) {
     return {static_cast<uint32_t>(slot.group), static_cast<uint32_t>(slot.binding)};