Portable Native Client is Google's approach to running native code within web-browsers. C/C++ code is compiled into an LLVM bitcode that can then run across all desktop versions of Chrome and Chrome OS without any program installation and the entire application is in a sandboxed environment. For those not familiar with Google's open-source Native Client, many more details are available from the technical overview page.
Chrome for Android with version 31 gets support for application shortcuts and payment requestAutocomplete() support for more easily filling out online forms. The initial requestAutocomplete() interface will allow for web developers and users to more easily handle web payments from Android devices.
More details on today's Google Chrome 31 Beta can be found via the Chromium blog.