[wasm] Record wire byte size on streaming compilation

Samples for the wire bytes size histogram were only recorded in
synchronous and asynchronous (non-streaming) compilation. This CL adds
another sample for streaming compilation.

R=ahaas@chromium.org

Change-Id: I11e2606796a83d6bebb35bd1d554aea43907bfba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1676284Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62366}

src/wasm/module-compiler.cc

@@ -2001,6 +2001,11 @@ void AsyncStreamingProcessor::OnFinishedStream(OwnedVector<uint8_t> bytes) {
   HandleScope scope(job_->isolate_);
   SaveAndSwitchContext saved_context(job_->isolate_, *job_->native_context_);
 
+  // Record the size of the wire bytes. In synchronous and asynchronous
+  // (non-streaming) compilation, this happens in {DecodeWasmModule}.
+  auto* histogram = job_->isolate_->counters()->wasm_wasm_module_size_bytes();
+  histogram->AddSample(static_cast<int>(bytes.size()));
+
   bool needs_finish = job_->DecrementAndCheckFinisherCount();
   if (job_->native_module_ == nullptr) {
     // We are processing a WebAssembly module without code section. Create the