Google’s Android 4.0 Ice Cream Sandwich (ICS) has completed four years in the market, with a current operating rate of 5.9 percent on registered Android Devices. Regarding that fact, Google is dropping future updates for Chrome on Android 4.0.
You can continue to use Chrome on your Android 4.0 ICS-based device, however, new features via future updates will not be seeded. Google says Chrome for Android 4.0 ICS has received twenty-four lifetime updates, pointing the latest version to Chrome 42.
SOURCE / Chromium Blog