This is an experimental idea to make adding a new tab on tablet even more convenient. When horizontal tab strip has white space(fewer than 4 to 5 tabs open), it would be nice to take advantage of that area and make it interactive. The user can long press on the empty space of tab strip to trigger a new tab that is displayed in press-down state. Once long press is released, the tab turns to a new foreground tab. The user can also drag the tab up or down if he/she wants to cancel adding a new tab. An interaction GIF: http://cl.ly/image/1a3n212R0R3i Notice when touch is released, “Plus” icon rotates and turns to a “Close” icon. Next step: * Prototype + Animation refinement * Implementation

Moving this to v2, not a blocker.

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