Event tracing for sync events

chrome/browser/sync/syncable/model_type.cc

Index: chrome/browser/sync/syncable/model_type.cc
diff --git a/chrome/browser/sync/syncable/model_type.cc b/chrome/browser/sync/syncable/model_type.cc
index aaf555eff12fed9d792ba4d1e0c08a039f7043f5..4354faefc10a7c8f3463f8da0f54e9ad00d50822 100644
--- a/chrome/browser/sync/syncable/model_type.cc
+++ b/chrome/browser/sync/syncable/model_type.cc
@@ -229,7 +229,7 @@ bool ShouldMaintainPosition(ModelType model_type) {
   return model_type == BOOKMARKS;
 }
 
-std::string ModelTypeToString(ModelType model_type) {
+const char* ModelTypeToCharPtr(ModelType model_type) {
   // This is used in serialization routines as well as for displaying debug
   // information.  Do not attempt to change these string values unless you know
   // what you're doing.
@@ -275,6 +275,10 @@ std::string ModelTypeToString(ModelType model_type) {
   return "INVALID";
 }
 
+std::string ModelTypeToString(ModelType model_type) {
+  return ModelTypeToCharPtr(model_type);
+}
+
 StringValue* ModelTypeToValue(ModelType model_type) {
   if (model_type >= syncable::FIRST_REAL_MODEL_TYPE) {
     return Value::CreateStringValue(ModelTypeToString(model_type));