Sync: Change Local IDs to GUID based to avoid ID collision

sync/syncable/in_memory_directory_backing_store.cc

Index: sync/syncable/in_memory_directory_backing_store.cc
diff --git a/sync/syncable/in_memory_directory_backing_store.cc b/sync/syncable/in_memory_directory_backing_store.cc
index 6e847eedbe93aa04b19ee7b053bc89ab9c1d317d..da668c4740d87f894b5fae6a6848028addf47f35 100644
--- a/sync/syncable/in_memory_directory_backing_store.cc
+++ b/sync/syncable/in_memory_directory_backing_store.cc
@@ -9,8 +9,7 @@ namespace syncable {
 
 InMemoryDirectoryBackingStore::InMemoryDirectoryBackingStore(
     const std::string& dir_name)
-    : DirectoryBackingStore(dir_name),
-      consistent_cache_guid_requested_(false) {
+    : DirectoryBackingStore(dir_name) {
 }
 
 DirOpenResult InMemoryDirectoryBackingStore::Load(
@@ -26,14 +25,6 @@ DirOpenResult InMemoryDirectoryBackingStore::Load(
   if (!InitializeTables())
     return FAILED_OPEN_DATABASE;
 
-  if (consistent_cache_guid_requested_) {
-    if (!db()->Execute(
-            "UPDATE share_info "
-            "SET cache_guid = 'IrcjZ2jyzHDV9Io4+zKcXQ=='")) {
-      return FAILED_OPEN_DATABASE;
-    }
-  }
-
   if (!LoadEntries(handles_map, metahandles_to_purge))
     return FAILED_DATABASE_CORRUPT;
   if (!LoadDeleteJournals(delete_journals))