Implement better HPACK Huffman code decoder.

net/spdy/hpack/hpack_huffman_table.cc

Index: net/spdy/hpack/hpack_huffman_table.cc
diff --git a/net/spdy/hpack/hpack_huffman_table.cc b/net/spdy/hpack/hpack_huffman_table.cc
index b56c58ece95b87291fa6f38602944332dd6f833d..e29e1c4debd675411f20bf4742caf0a974f9bb74 100644
--- a/net/spdy/hpack/hpack_huffman_table.cc
+++ b/net/spdy/hpack/hpack_huffman_table.cc
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <memory>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
@@ -263,9 +264,9 @@ size_t HpackHuffmanTable::EncodedSize(StringPiece in) const {
   return bit_count / 8;
 }
 
-bool HpackHuffmanTable::DecodeString(HpackInputStream* in,
-                                     size_t out_capacity,
-                                     string* out) const {
+bool HpackHuffmanTable::GenericDecodeString(HpackInputStream* in,
+                                            size_t out_capacity,
+                                            string* out) const {
   // Number of decode iterations required for a 32-bit code.
   const int kDecodeIterations = static_cast<int>(
       std::ceil((32.f - kDecodeTableRootBits) / kDecodeTableBranchBits));