PlzNavigate: Release StreamHandle.

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index 5a380418d28d011a9ddcdc29c4ad4f6b2ec163bb..5379a7bfb78bedd42e4281ee30f3c142432758d8 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -13,6 +13,7 @@
 #include <vector>
 
 #include "base/bind.h"
+#include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ -347,7 +348,10 @@ void SetSecurityStyleAndDetails(const GURL& url,
 }  // namespace
 
 StreamOverrideParameters::StreamOverrideParameters() {}
-StreamOverrideParameters::~StreamOverrideParameters() {}
+StreamOverrideParameters::~StreamOverrideParameters() {
+  if (on_delete)
+    std::move(on_delete).Run(stream_url);
+}
 
 // This inner class exists since the WebURLLoader may be deleted while inside a
 // call to WebURLLoaderClient.  Refcounting is to keep the context from being