[Sync] Remove unneeded 'using syncer::' lines and 'syncer::' scopings

sync/api/sync_data.cc

Index: sync/api/sync_data.cc
diff --git a/sync/api/sync_data.cc b/sync/api/sync_data.cc
index a2a419106a022868e9bd028e1fb8c1192c97fec0..b9e2ca999f57390a337614161fda82a51e9524f9 100644
--- a/sync/api/sync_data.cc
+++ b/sync/api/sync_data.cc
@@ -44,7 +44,7 @@ void SyncData::ImmutableSyncEntityTraits::Swap(sync_pb::SyncEntity* t1,
 
 SyncData::SyncData()
     : is_valid_(false),
-      id_(syncer::kInvalidId) {}
+      id_(kInvalidId) {}
 
 SyncData::SyncData(int64 id, sync_pb::SyncEntity* entity)
     : is_valid_(true),
@@ -56,9 +56,9 @@ SyncData::~SyncData() {}
 // Static.
 SyncData SyncData::CreateLocalDelete(
     const std::string& sync_tag,
-    syncer::ModelType datatype) {
+    ModelType datatype) {
   sync_pb::EntitySpecifics specifics;
-  syncer::AddDefaultFieldValue(datatype, &specifics);
+  AddDefaultFieldValue(datatype, &specifics);
   return CreateLocalData(sync_tag, "", specifics);
 }
 
@@ -71,13 +71,13 @@ SyncData SyncData::CreateLocalData(
   entity.set_client_defined_unique_tag(sync_tag);
   entity.set_non_unique_name(non_unique_title);
   entity.mutable_specifics()->CopyFrom(specifics);
-  return SyncData(syncer::kInvalidId, &entity);
+  return SyncData(kInvalidId, &entity);
 }
 
 // Static.
 SyncData SyncData::CreateRemoteData(
     int64 id, const sync_pb::EntitySpecifics& specifics) {
-  DCHECK_NE(id, syncer::kInvalidId);
+  DCHECK_NE(id, kInvalidId);
   sync_pb::SyncEntity entity;
   entity.mutable_specifics()->CopyFrom(specifics);
   return SyncData(id, &entity);
@@ -91,8 +91,8 @@ const sync_pb::EntitySpecifics& SyncData::GetSpecifics() const {
   return immutable_entity_.Get().specifics();
 }
 
-syncer::ModelType SyncData::GetDataType() const {
-  return syncer::GetModelTypeFromSpecifics(GetSpecifics());
+ModelType SyncData::GetDataType() const {
+  return GetModelTypeFromSpecifics(GetSpecifics());
 }
 
 const std::string& SyncData::GetTag() const {
@@ -112,17 +112,16 @@ int64 SyncData::GetRemoteId() const {
 }
 
 bool SyncData::IsLocal() const {
-  return id_ == syncer::kInvalidId;
+  return id_ == kInvalidId;
 }
 
 std::string SyncData::ToString() const {
   if (!IsValid())
     return "<Invalid SyncData>";
 
-  std::string type = syncer::ModelTypeToString(GetDataType());
+  std::string type = ModelTypeToString(GetDataType());
   std::string specifics;
-  scoped_ptr<DictionaryValue> value(
-      syncer::EntitySpecificsToValue(GetSpecifics()));
+  scoped_ptr<DictionaryValue> value(EntitySpecificsToValue(GetSpecifics()));
   base::JSONWriter::WriteWithOptions(value.get(),
                                      base::JSONWriter::OPTIONS_PRETTY_PRINT,
                                      &specifics);