Update HPACK implementation to draft 05

net/spdy/hpack_header_table.h

Index: net/spdy/hpack_header_table.h
diff --git a/net/spdy/hpack_header_table.h b/net/spdy/hpack_header_table.h
index 87758d5f17a2a51850aa830d3df8f15d6b03b9a8..a97d4a7f6b93bc7a38e0428fb889f2f07d460b48 100644
--- a/net/spdy/hpack_header_table.h
+++ b/net/spdy/hpack_header_table.h
@@ -17,7 +17,7 @@
 namespace net {
 
 // All section references below are to
-// http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-04
+// http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-05
 // .
 
 // A data structure for both the header table (described in 3.1.2) and
@@ -36,10 +36,10 @@ class NET_EXPORT_PRIVATE HpackHeaderTable {
   // Returns the total number of entries.
   uint32 GetEntryCount() const;
 
-  // The given index must be >= 0 and < GetEntryCount().
+  // The given index must be >= 1 and <= GetEntryCount().
   const HpackEntry& GetEntry(uint32 index) const;
 
-  // The given index must be >= 0 and < GetEntryCount().
+  // The given index must be >= 1 and <= GetEntryCount().
   HpackEntry* GetMutableEntry(uint32 index);
 
   // Sets the maximum size of the header table, evicting entries if
@@ -49,12 +49,12 @@ class NET_EXPORT_PRIVATE HpackHeaderTable {
   // The given entry must not be one from the header table, since it
   // may get evicted. Tries to add the given entry to the header
   // table, evicting entries if necessary as described in 3.3.3. index
-  // will be filled in with the index of the added entry, or -1 if the
+  // will be filled in with the index of the added entry, or 0 if the
   // entry could not be added. removed_referenced_indices will be
   // filled in with the indices of any removed entries that were in
   // the reference set.
   void TryAddEntry(const HpackEntry& entry,
-                   int32* index,
+                   uint32* index,
                    std::vector<uint32>* removed_referenced_indices);
 
  private: