Google has just Updated it's Chrome for Android Beta to version 38 on the Play Store with many changes. It's not a major update unlike the v37-beta update that brought us the Chrome Materiel design UI. According to the Chrome release blog Chrome Beta v38 includes additional Material Design user interface elements and new support for Android's battery status and screen orientation APIs.
If you're running Android L on your Nexus 5 or Nexus 7, you might also see a new option in the Settings menu. "Merge tabs and apps" would seem to indicate the kind of functionality that we've seen in "Project Hera" and confirmed at Google I/O. Unfortunately, it doesn't seem to work yet. SystemUI has been crashing periodically since we've turned that slider on.