root/chrome/android/java/src/org/chromium/chrome/browser/banners/

[..]
  1. AppBannerManager.java
  2. AppBannerView.java
  3. AppData.java
  4. AppDetailsDelegate.java
  5. InstallerDelegate.java
  6. RatingView.java
  7. SwipableOverlayView.java
[..]