Split up quic_frames.{h,cc} into files for each frame type.

net/quic/core/frames/quic_padding_frame.h

Index: net/quic/core/frames/quic_padding_frame.h
diff --git a/net/quic/core/frames/quic_padding_frame.h b/net/quic/core/frames/quic_padding_frame.h
new file mode 100644
index 0000000000000000000000000000000000000000..bca7118954806d284457a0184547b4de206b163f
--- /dev/null
+++ b/net/quic/core/frames/quic_padding_frame.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_QUIC_CORE_FRAMES_QUIC_PADDING_FRAME_H_
+#define NET_QUIC_CORE_FRAMES_QUIC_PADDING_FRAME_H_
+
+#include <cstdint>
+#include <ostream>
+
+#include "net/base/net_export.h"
+
+namespace net {
+
+// A padding frame contains no payload.
+struct NET_EXPORT_PRIVATE QuicPaddingFrame {
+  QuicPaddingFrame() : num_padding_bytes(-1) {}
+  explicit QuicPaddingFrame(int num_padding_bytes)
+      : num_padding_bytes(num_padding_bytes) {}
+
+  friend NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
+                                                     const QuicPaddingFrame& s);
+
+  // -1: full padding to the end of a max-sized packet
+  // otherwise: only pad up to num_padding_bytes bytes
+  int num_padding_bytes;
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_CORE_FRAMES_QUIC_PADDING_FRAME_H_