[Sync] Sync should run canary cycle after any network related error

sync/engine/net/server_connection_manager.cc

Index: sync/engine/net/server_connection_manager.cc
diff --git a/sync/engine/net/server_connection_manager.cc b/sync/engine/net/server_connection_manager.cc
index 83fbafe24e8c8d5fe7572b2cd1257b37c3b43a96..a5be7a51c7d0e6fb9c1d7e7778dfbfb662fee944 100644
--- a/sync/engine/net/server_connection_manager.cc
+++ b/sync/engine/net/server_connection_manager.cc
@@ -55,23 +55,6 @@ const char* HttpResponse::GetServerConnectionCodeString(
 
 #undef ENUM_CASE
 
-// TODO(clamy): check if all errors are in the right category.
-HttpResponse::ServerConnectionCode
-HttpResponse::ServerConnectionCodeFromNetError(int error_code) {
-  switch (error_code) {
-    case net::ERR_ABORTED:
-    case net::ERR_SOCKET_NOT_CONNECTED:
-    case net::ERR_NETWORK_CHANGED:
-    case net::ERR_CONNECTION_FAILED:
-    case net::ERR_NAME_NOT_RESOLVED:
-    case net::ERR_INTERNET_DISCONNECTED:
-    case net::ERR_NETWORK_ACCESS_DENIED:
-    case net::ERR_NETWORK_IO_SUSPENDED:
-      return CONNECTION_UNAVAILABLE;
-  }
-  return IO_ERROR;
-}
-
 ServerConnectionManager::Connection::Connection(
     ServerConnectionManager* scm) : scm_(scm) {
 }