Introduce StreamRegistry::NotifyReaderAbortedBeforeRegistration()

content/browser/streams/stream_registry.cc

Index: content/browser/streams/stream_registry.cc
diff --git a/content/browser/streams/stream_registry.cc b/content/browser/streams/stream_registry.cc
index d2321c874b8e6a5a0746d4f1ccc6af62f8b58ffb..63c413b1632983c8f5fac85eb380c019c0c614d6 100644
--- a/content/browser/streams/stream_registry.cc
+++ b/content/browser/streams/stream_registry.cc
@@ -23,15 +23,21 @@ StreamRegistry::~StreamRegistry() {
   DCHECK(register_observers_.empty());
 }
 
-void StreamRegistry::RegisterStream(scoped_refptr<Stream> stream) {
+void StreamRegistry::RegisterStream(Stream* stream) {
   DCHECK(CalledOnValidThread());
-  DCHECK(stream.get());
+  DCHECK(stream);
   DCHECK(!stream->url().is_empty());
+
+  auto aborted_url_itr = reader_aborted_urls_.find(stream->url());
+  if (aborted_url_itr != reader_aborted_urls_.end()) {
+    reader_aborted_urls_.erase(aborted_url_itr);
+    return;
+  }
   streams_[stream->url()] = stream;
 
   auto itr = register_observers_.find(stream->url());
   if (itr != register_observers_.end())
-    itr->second->OnStreamRegistered(stream.get());
+    itr->second->OnStreamRegistered(stream);
 }
 
 scoped_refptr<Stream> StreamRegistry::GetStream(const GURL& url) {
@@ -107,5 +113,9 @@ void StreamRegistry::RemoveRegisterObserver(const GURL& url) {
   register_observers_.erase(url);
 }
 
+void StreamRegistry::AbortPendingStream(const GURL& url) {
+  DCHECK(CalledOnValidThread());
+  reader_aborted_urls_.insert(url);
+}
 
 }  // namespace content