Notice the cursor in search field below
I could not use floating label in the navbar because it takes extra height which was making other elements feel shorter. So I went with simplest textinput.
I don't know much about material design specifications. But, sites like gaming.youtube.com and google plus beta version use material type search bar. The current textinput available in material is awesome for forms. But for search, a textinput with complete border looks more apt.
If you guys consider it as a valid request please add it. I am also willing to contribute if needed.