Fix uninitialized fields in hpack code.

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 0e3ca1b060eb5f49178ab881724dc6da60bf5b57..7a6bfc3ad43ec5158906c3810e4c4abb1d98bcff 100644
--- a/net/spdy/hpack/hpack_huffman_table.cc
+++ b/net/spdy/hpack/hpack_huffman_table.cc
@@ -50,7 +50,7 @@ size_t HpackHuffmanTable::DecodeTable::size() const {
   return size_t(1) << indexed_length;
 }
 
-HpackHuffmanTable::HpackHuffmanTable() {}
+HpackHuffmanTable::HpackHuffmanTable() : pad_bits_(0), failed_symbol_id_(0) {}
 
 HpackHuffmanTable::~HpackHuffmanTable() {}