include <iomanip> for std::setw and std::setfill

Change-Id: Ia7cc28644f1429a8d103a8a64173e13fd1f448b1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/164642
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
Kokoro: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
diff --git a/src/dawn/native/stream/ByteVectorSink.cpp b/src/dawn/native/stream/ByteVectorSink.cpp
index 9fb6033..03e019b 100644
--- a/src/dawn/native/stream/ByteVectorSink.cpp
+++ b/src/dawn/native/stream/ByteVectorSink.cpp
@@ -27,6 +27,7 @@
 
 #include "dawn/native/stream/ByteVectorSink.h"
 
+#include <iomanip>
 #include "dawn/native/stream/Stream.h"
 
 namespace dawn::native::stream {