fix: -Wunsafe-buffer-usage warning in ChunkedDataPipeReadableStream (#44211)

* chore: rename v8_value_serializer.cc,h to v8_util.cc,h

* feat: add electron::util::as_byte_span(v8::Local<v8::ArrayBuffer>)

* fix: -Wunsafe-buffer-usage warnings in ChunkedDataPipeReadableStream::ReadInternal()

Xref: 5619253

* refactor: restore node buffer span util

* refactor: remove redundant span wrapper

shell/common/v8_util.h

@@ -0,0 +1,41 @@
+// Copyright (c) 2020 Slack Technologies, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ELECTRON_SHELL_COMMON_V8_VALUE_SERIALIZER_H_
+#define ELECTRON_SHELL_COMMON_V8_VALUE_SERIALIZER_H_
+
+#include "base/containers/span.h"
+#include "ui/gfx/image/image_skia_rep.h"
+
+namespace v8 {
+class ArrayBufferView;
+class Isolate;
+template <class T>
+class Local;
+class Value;
+}  // namespace v8
+
+namespace blink {
+struct CloneableMessage;
+}
+
+namespace electron {
+
+bool SerializeV8Value(v8::Isolate* isolate,
+                      v8::Local<v8::Value> value,
+                      blink::CloneableMessage* out);
+v8::Local<v8::Value> DeserializeV8Value(v8::Isolate* isolate,
+                                        const blink::CloneableMessage& in);
+v8::Local<v8::Value> DeserializeV8Value(v8::Isolate* isolate,
+                                        base::span<const uint8_t> data);
+
+namespace util {
+
+[[nodiscard]] base::span<uint8_t> as_byte_span(
+    v8::Local<v8::ArrayBufferView> abv);
+
+}  // namespace util
+}  // namespace electron
+
+#endif  // ELECTRON_SHELL_COMMON_V8_VALUE_SERIALIZER_H_