Revert of Fix UI glitches on Performance and Memory panels

Revert of Fix UI glitches on Performance and Memory panels (patchset #2 id:20001 of https://codereview.chromium.org/2640403003/ )

Reason for revert:
Broke timeline flamechart vertical scroll

Original issue's description:
> Fix UI glitches on Performance and Memory panels
> 
> Network pane font was inconsistent.
> Target select combobox on Memory panel had no padding.
> Default tree view height was too small.
> 
> BUG=682892
> 
> Review-Url: https://codereview.chromium.org/2640403003
> Cr-Commit-Position: refs/heads/master@{#444959}
> Committed: https://chromium.googlesource.com/chromium/src/+/5ffeda5222ba52d797c90dd247be0113c0ced577

TBR=pfeldman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=682892
Review-Url: https://codereview.chromium.org/2646193003
Cr-Commit-Position: refs/heads/master@{#445184}
Committed: https://chromium.googlesource.com/chromium/src/+/5b0c54c01686c19ed8c9d4dee664aa6312951cb0

[alph, 2017-01-20 22:23:19]

The CQ bit was checked by alph@chromium.org

[alph, 2017-01-20 22:23:20]

Created Revert of Fix UI glitches on Performance and Memory panels

[commit-bot: I haz the power, 2017-01-20 22:23:50]

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, 2017-01-20 22:24:39]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484950999376020, "parent_rev":
"6b26b7a9ba6b62730399c632dac0fcbfce0a15bd", "commit_rev":
"5b0c54c01686c19ed8c9d4dee664aa6312951cb0"}

[commit-bot: I haz the power, 2017-01-20 22:25:12]

Description was changed from

==========
Revert of Fix UI glitches on Performance and Memory panels (patchset #2 id:20001
of https://codereview.chromium.org/2640403003/ )

Reason for revert:
Broke timeline flamechart vertical scroll

Original issue's description:
> Fix UI glitches on Performance and Memory panels
> 
> Network pane font was inconsistent.
> Target select combobox on Memory panel had no padding.
> Default tree view height was too small.
> 
> BUG=682892
> 
> Review-Url: https://codereview.chromium.org/2640403003
> Cr-Commit-Position: refs/heads/master@{#444959}
> Committed:
https://chromium.googlesource.com/chromium/src/+/5ffeda5222ba52d797c90dd247be...

TBR=pfeldman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=682892
==========

to

==========
Revert of Fix UI glitches on Performance and Memory panels (patchset #2 id:20001
of https://codereview.chromium.org/2640403003/ )

Reason for revert:
Broke timeline flamechart vertical scroll

Original issue's description:
> Fix UI glitches on Performance and Memory panels
> 
> Network pane font was inconsistent.
> Target select combobox on Memory panel had no padding.
> Default tree view height was too small.
> 
> BUG=682892
> 
> Review-Url: https://codereview.chromium.org/2640403003
> Cr-Commit-Position: refs/heads/master@{#444959}
> Committed:
https://chromium.googlesource.com/chromium/src/+/5ffeda5222ba52d797c90dd247be...

TBR=pfeldman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=682892

Review-Url: https://codereview.chromium.org/2646193003
Cr-Commit-Position: refs/heads/master@{#445184}
Committed:
https://chromium.googlesource.com/chromium/src/+/5b0c54c01686c19ed8c9d4dee664...
==========

[commit-bot: I haz the power, 2017-01-20 22:25:13]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/5b0c54c01686c19ed8c9d4dee664...