sync: Specialize functions that fetch type root

sync/syncable/entry.cc

 // Copyright 2012 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 "sync/syncable/entry.h"
 
 #include <iomanip>
 
 #include "base/json/string_escape.h"
 #include "base/strings/string_util.h"
@@ skipping 10 matching lines @@
 Entry::Entry(BaseTransaction* trans, GetById, const Id& id)
     : basetrans_(trans) {
   kernel_ = trans->directory()->GetEntryById(id);
 }
 
 Entry::Entry(BaseTransaction* trans, GetByClientTag, const string& tag)
     : basetrans_(trans) {
   kernel_ = trans->directory()->GetEntryByClientTag(tag);
 }
 
-Entry::Entry(BaseTransaction* trans, GetByServerTag, const string& tag)
+Entry::Entry(BaseTransaction* trans, GetTypeRoot, ModelType type)
     : basetrans_(trans) {
+  const std::string& tag = ModelTypeToRootTag(type);
   kernel_ = trans->directory()->GetEntryByServerTag(tag);
 }
 
 Entry::Entry(BaseTransaction* trans, GetByHandle, int64 metahandle)
     : basetrans_(trans) {
   kernel_ = trans->directory()->GetEntryByHandle(metahandle);
 }
 
+Entry::Entry(BaseTransaction* trans, GetByServerTag, const string& tag)
+    : basetrans_(trans) {
+  kernel_ = trans->directory()->GetEntryByServerTag(tag);
+}
+
 Directory* Entry::dir() const {
   return basetrans_->directory();
 }
 
 base::DictionaryValue* Entry::ToValue(Cryptographer* cryptographer) const {
   base::DictionaryValue* entry_info = new base::DictionaryValue();
   entry_info->SetBoolean("good", good());
   if (good()) {
     entry_info->Set("kernel", kernel_->ToValue(cryptographer));
     entry_info->Set("modelType",
@@ skipping 116 matching lines @@
   os << "TempFlags: ";
   for ( ; i < BIT_TEMPS_END; ++i) {
     if (kernel->ref(static_cast<BitTemp>(i)))
       os << "#" << i - BIT_TEMPS_BEGIN << ", ";
   }
   return os;
 }
 
 }  // namespace syncable
 }  // namespace syncer