[Sync] Move ModelType and related classes to 'syncer' namespace

sync/internal_api/public/base_node.h

Index: sync/internal_api/public/base_node.h
diff --git a/sync/internal_api/public/base_node.h b/sync/internal_api/public/base_node.h
index 7112d7314a25bf586fde3b3f862fb602d99ebd58..7212927f822215c090e0f9c357efa7c5f70bd3cb 100644
--- a/sync/internal_api/public/base_node.h
+++ b/sync/internal_api/public/base_node.h
@@ -79,7 +79,7 @@ class BaseNode {
   // by doing a client tag lookup. Returns false on failure. A deleted node
   // will return FALSE.
   virtual InitByLookupResult InitByClientTagLookup(
-      syncable::ModelType model_type,
+      syncer::ModelType model_type,
       const std::string& tag) = 0;
 
   // Each object is identified by a 64-bit id (internally, the syncable
@@ -107,7 +107,7 @@ class BaseNode {
 
   // Returns the model type of this object.  The model type is set at node
   // creation time and is expected never to change.
-  syncable::ModelType GetModelType() const;
+  syncer::ModelType GetModelType() const;
 
   // Getter specific to the BOOKMARK datatype.  Returns protobuf
   // data.  Can only be called if GetModelType() == BOOKMARK.
@@ -203,7 +203,7 @@ class BaseNode {
   virtual ~BaseNode();
   // The server has a size limit on client tags, so we generate a fixed length
   // hash locally. This also ensures that ModelTypes have unique namespaces.
-  static std::string GenerateSyncableHash(syncable::ModelType model_type,
+  static std::string GenerateSyncableHash(syncer::ModelType model_type,
       const std::string& client_tag);
 
   // Determines whether part of the entry is encrypted, and if so attempts to