FBTF: Move a bunch of code to the headers and remove includes.

net/base/dnssec_chain_verifier.cc

Index: net/base/dnssec_chain_verifier.cc
diff --git a/net/base/dnssec_chain_verifier.cc b/net/base/dnssec_chain_verifier.cc
index a32c68351ebb3fbea6747dc8274bbfe7af8e2a0d..2dbacbc32edc849dd641544fa5c6aea3b6a6888b 100644
--- a/net/base/dnssec_chain_verifier.cc
+++ b/net/base/dnssec_chain_verifier.cc
@@ -10,6 +10,7 @@
 #include "base/sha2.h"
 #include "base/string_util.h"
 #include "net/base/dns_util.h"
+#include "net/base/dnssec_keyset.h"
 
 // We don't have a location for the spec yet, so we'll include it here until it
 // finds a better home.
@@ -139,6 +140,15 @@ static const uint16 kRootKeyID = 19036;
 
 namespace net {
 
+struct DNSSECChainVerifier::Zone {
+  base::StringPiece name;
+  // The number of consecutive labels which |name| shares with |target_|,
+  // counting right-to-left from the root.
+  unsigned matching_labels;
+  DNSSECKeySet trusted_keys;
+  Zone* prev;
+};
+
 DNSSECChainVerifier::DNSSECChainVerifier(const std::string& target,
                                          const base::StringPiece& chain)
     : current_zone_(NULL),