Isso é o que o google diz sobre a alteração no diretório de instalação:
Actually we did change the download page to install system-level by default (and fall back to user level if that fails or the user says "no" to the UAC prompt). Installing in AppData was never a security measure, it was for convenience to make sure people could install Chrome even without admin rights.
Our data shows that preferring a system level (Program Files) install with a fallback to user level improves the install success rate. - Mark Larson (Google)
Padrão: C: \ Arquivos de programas (x86) \ Google \ Chrome \ Application \
Retiro: C: \ Usuários \ Nome do usuário \ AppData \ Local \ Google \ Chrome \ Aplicativo