Revert of Whitespace.

(patchset #1 id:1 of https://codereview.webrtc.org/2547553002/)

Reason for revert:
whitespace reverts need no reason.

Original issue's description:
> Whitespace.
>
> For manual commit.
>
> BUG=668624
> TBR=kjellander@webrtc.org
> NOTRY=True
> NOPRESUBMIT=True
>
> Committed: https://crrev.com/aa7a9a2dc03c11ea6dc52a8424c4485e2f48d650
> Cr-Commit-Position: refs/heads/master@{#15361}

TBR=kjellander@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=668624

Review URL: https://codereview.webrtc.org/2549453003 .

Cr-Commit-Position: refs/heads/master@{#15362}

tools/whitespace.txt

@@ -4,3 +4,4 @@ Try to write something funny. And please don't add trailing whitespace.
 Whitespaces are cool, except when they're trailing. They they're kind of
 80s.
 Here's a funny story: What do you call a root beer in a square glass? Beer!
+not-a-whitespace