Just now, on the internet people are rumoring about the next Android OS version to be 4.5 which will known as the Android L (Lolipop). The latest Google Chrome beta 37 release reveals a Android 4.4.99; which we can take as a leading indicator in terms of the next build of Android will be Android 4.5 other than 5.0.
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So, this chrome beta Android app version 4.49 confirms that the next version of Android OS will be 4.5 rather than 5.0 that we have been expecting. Beside this Android OS V 4.5 rumor you can just download the Google Chrome Beta.