[turbolizer] Style improvements.

[turbolizer] Style improvements.

- Remove duplicated CSS.
- Expand landing area of upload button.
- Give the toolbox a transparent white background.
- Make the phase-select box look nicer before file load.
- Remove the margin at the top of the screen.

The height of the margin was exactly the height of span#graph-toolbox,
and due to the semantics of position:relative, space was reserved for it
at the top of div#middle.

BUG=
R=danno

Committed: https://crrev.com/7ef24ad99c4d2bf65bca3782ad9a22a272dc3cf4
Cr-Commit-Position: refs/heads/master@{#38003}

[bgeron, 2016-07-21 18:17:07]

Please take a look. I'm OOO on Friday, so discussing would best work on a
different day. Note that all there are some CL dependencies, none of which are
insurmountable. I try to send the CLs in order, so if you review in
chronological order you should be fine. This message is the same for all CLs.

[danno, 2016-07-22 12:49:20]

lgtm

[bgeron, 2016-07-25 09:27:10]

The CQ bit was checked by bgeron@google.com

[commit-bot: I haz the power, 2016-07-25 09:27:13]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-25 09:48:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-25 09:50:50]

Description was changed from

==========
[turbolizer] Style improvements.

- Remove duplicated CSS.
- Expand landing area of upload button.
- Give the toolbox a transparent white background.
- Make the phase-select box look nicer before file load.
- Remove the margin at the top of the screen.

The height of the margin was exactly the height of span#graph-toolbox,
and due to the semantics of position:relative, space was reserved for it
at the top of div#middle.

BUG=
R=danno
==========

to

==========
[turbolizer] Style improvements.

- Remove duplicated CSS.
- Expand landing area of upload button.
- Give the toolbox a transparent white background.
- Make the phase-select box look nicer before file load.
- Remove the margin at the top of the screen.

The height of the margin was exactly the height of span#graph-toolbox,
and due to the semantics of position:relative, space was reserved for it
at the top of div#middle.

BUG=
R=danno

Committed: https://crrev.com/7ef24ad99c4d2bf65bca3782ad9a22a272dc3cf4
Cr-Commit-Position: refs/heads/master@{#38003}
==========

[commit-bot: I haz the power, 2016-07-25 09:50:51]

Patchset 1 (id:??) landed as
https://crrev.com/7ef24ad99c4d2bf65bca3782ad9a22a272dc3cf4
Cr-Commit-Position: refs/heads/master@{#38003}