[Sync] Remove now-obsolete FastDump class

chrome/browser/sync/syncable/syncable_id.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/syncable/syncable_id.h"
 
 #include <iosfwd>
 
 #include "base/string_util.h"
 
 using std::ostream;
 using std::string;
 
 namespace syncable {
 const Id kNullId;  // Currently == root.
 
 ostream& operator<<(ostream& out, const Id& id) {
   out << id.s_;
   return out;
 }
 
-using browser_sync::FastDump;
-FastDump& operator<<(FastDump& dump, const Id& id) {
-  dump.out_->sputn(id.s_.data(), id.s_.size());
-  return dump;
-}
-
 string Id::GetServerId() const {
   // Currently root is the string "0". We need to decide on a true value.
   // "" would be convenient here, as the IsRoot call would not be needed.
   if (IsRoot())
     return "0";
   return s_.substr(1);
 }
 
 Id Id::CreateFromServerId(const string& server_id) {
   Id id;
   if (server_id == "0")
     id.s_ = "r";
   else
     id.s_ = string("s") + server_id;
   return id;
 }
 
 Id Id::CreateFromClientString(const string& local_id) {
   Id id;
   if (local_id == "0")
     id.s_ = "r";
   else
     id.s_ = string("c") + local_id;
   return id;
 }
 
 }  // namespace syncable