Move header-ordering validation from hpack decoder to header validator.

net/spdy/hpack/hpack_decoder.cc

Index: net/spdy/hpack/hpack_decoder.cc
diff --git a/net/spdy/hpack/hpack_decoder.cc b/net/spdy/hpack/hpack_decoder.cc
index e8f3f263915178e6c62a78600d837d5a5aa43ed2..dbf3152efc2303401111f274574c9c1e8b291279 100644
--- a/net/spdy/hpack/hpack_decoder.cc
+++ b/net/spdy/hpack/hpack_decoder.cc
@@ -25,7 +25,6 @@ HpackDecoder::HpackDecoder()
     : max_string_literal_size_(kDefaultMaxStringLiteralSize),
       handler_(nullptr),
       total_header_bytes_(0),
-      regular_header_seen_(false),
       header_block_started_(false),
       total_parsed_bytes_(0) {}
 
@@ -75,8 +74,6 @@ bool HpackDecoder::HandleControlFrameHeadersData(const char* headers_data,
 }
 
 bool HpackDecoder::HandleControlFrameHeadersComplete(size_t* compressed_len) {
-  regular_header_seen_ = false;
-
   if (compressed_len != nullptr) {
     *compressed_len = total_parsed_bytes_;
   }
@@ -101,17 +98,6 @@ bool HpackDecoder::HandleHeaderRepresentation(StringPiece name,
                                               StringPiece value) {
   total_header_bytes_ += name.size() + value.size();
 
-  // Fail if pseudo-header follows regular header.
-  if (name.size() > 0) {
-    if (name[0] == kPseudoHeaderPrefix) {
-      if (regular_header_seen_) {
-        return false;
-      }
-    } else {
-      regular_header_seen_ = true;
-    }
-  }
-
   if (handler_ == nullptr) {
     auto it = decoded_block_.find(name);
     if (it == decoded_block_.end()) {