Use file::IsAbsolutePath consistently
Use file::IsAbsolutePath consistently

PiperOrigin-RevId: 302073992
Change-Id: Ib3b9fbedc6e85a1abd87cbc683d8a8c3dc3daf87

google/sandboxed-api,google/sandboxed-api,google/sandboxed-api,google/sandboxed-api