HTTP retry support.

net/http/http_stream_parser.h

Index: net/http/http_stream_parser.h
diff --git a/net/http/http_stream_parser.h b/net/http/http_stream_parser.h
index a8d0447a086572ad51f23ffb7ad4a1910a8cdcaf..093baffb9afe6975a174c6ea714f659960a15836 100644
--- a/net/http/http_stream_parser.h
+++ b/net/http/http_stream_parser.h
@@ -75,6 +75,12 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
 
   bool IsConnectionReusable() const;
 
+  void SetRestartInfo(int64 read_offset, const void* hash, size_t hash_length);
+
+  void GetHash(void* output, size_t hash_length);
+
+  int64 GetReceivedBodyLength() const { return response_body_read_; }
+
   int64 received_bytes() const { return received_bytes_; }
 
   void GetSSLInfo(SSLInfo* ssl_info);
@@ -104,6 +110,7 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
 
  private:
   class SeekableIOBuffer;
+  class HttpStreamHash;
 
   // FOO_COMPLETE states implement the second half of potentially asynchronous
   // operations and don't necessarily mean that FOO is complete.
@@ -209,6 +216,13 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
   // closes the connection.
   int64 response_body_length_;
 
+  // Indicates the amount of body data that should be skipped when reading from
+  // a retried request we have already read data from.
+  int64 read_offset_;
+
+  // Hash of content as it is retrieved.
+  scoped_ptr<HttpStreamHash> stream_hash_;
+
   // Keep track of the number of response body bytes read so far.
   int64 response_body_read_;