Introduce TTL in QuicReceivedPacket.

net/quic/core/quic_protocol.h

Index: net/quic/core/quic_protocol.h
diff --git a/net/quic/core/quic_protocol.h b/net/quic/core/quic_protocol.h
index 34e6a407267f8a900e407b6f44bf34d5d374622c..6290ccf199af313850a223289b5f5f0dd36a4357 100644
--- a/net/quic/core/quic_protocol.h
+++ b/net/quic/core/quic_protocol.h
@@ -1264,7 +1264,7 @@ typedef std::vector<QuicFrame> QuicFrames;
 class NET_EXPORT_PRIVATE QuicData {
  public:
   QuicData(const char* buffer, size_t length);
-  QuicData(char* buffer, size_t length, bool owns_buffer);
+  QuicData(const char* buffer, size_t length, bool owns_buffer);
   virtual ~QuicData();
 
   base::StringPiece AsStringPiece() const {
@@ -1316,7 +1316,7 @@ class NET_EXPORT_PRIVATE QuicPacket : public QuicData {
 class NET_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
  public:
   QuicEncryptedPacket(const char* buffer, size_t length);
-  QuicEncryptedPacket(char* buffer, size_t length, bool owns_buffer);
+  QuicEncryptedPacket(const char* buffer, size_t length, bool owns_buffer);
 
   // Clones the packet into a new packet which owns the buffer.
   QuicEncryptedPacket* Clone() const;
@@ -1337,10 +1337,16 @@ class NET_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
 class NET_EXPORT_PRIVATE QuicReceivedPacket : public QuicEncryptedPacket {
  public:
   QuicReceivedPacket(const char* buffer, size_t length, QuicTime receipt_time);
-  QuicReceivedPacket(char* buffer,
+  QuicReceivedPacket(const char* buffer,
                      size_t length,
                      QuicTime receipt_time,
                      bool owns_buffer);
+  QuicReceivedPacket(const char* buffer,
+                     size_t length,
+                     QuicTime receipt_time,
+                     bool owns_buffer,
+                     int ttl,
+                     bool ttl_valid);
 
   // Clones the packet into a new packet which owns the buffer.
   QuicReceivedPacket* Clone() const;
@@ -1348,6 +1354,9 @@ class NET_EXPORT_PRIVATE QuicReceivedPacket : public QuicEncryptedPacket {
   // Returns the time at which the packet was received.
   QuicTime receipt_time() const { return receipt_time_; }
 
+  // This is the TTL of the packet, assuming ttl_vaild_ is true.
+  int ttl() const { return ttl_; }
+
   // By default, gtest prints the raw bytes of an object. The bool data
   // member (in the base class QuicData) causes this object to have padding
   // bytes, which causes the default gtest object printer to read
@@ -1358,6 +1367,7 @@ class NET_EXPORT_PRIVATE QuicReceivedPacket : public QuicEncryptedPacket {
 
  private:
   const QuicTime receipt_time_;
+  int ttl_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicReceivedPacket);
 };