This tab is 100% correct.  I'm just going to put the chords down.  Listen to the song and figure out the strumming pattern and order for yourself...it's pretty easy.
Drop the E a full step
X's all the way down = scrape

Intro

x  x  x  x    Those are all the chords you need for the intro
x  x  x  x
8  7  7  7
x  x  x  5
6  6  5  5
x  x  x  x

-----------------------------------------------------------------
Pre-chorus

x  x  x  x  x  x  x
x  x  x  x  x  x  x
8  10 12 15 x  x  x
x  x  x  x  x  x  x
6  8  10 13 x  x  x
x  x  x  x  x  x  x

-----------------------------------------------------------------
Chorus

x  x  x  x    x  x  x  x  x  x  x  x
x  x  x  x    x  x  x  x  x  x  x  x
x  x  x  x    x  x  x  x  x  x  x  x
5  1  8  3    5  x  x  x  x  1  8  3
5  1  8  3    5  x  x  x  x  1  8  3
5  1  8  3    5  x  x  x  x  1  8  3

-----------------------------------------------------------------
Outro

x