Revert "Prevent chrome://net-internals/#export from flickering"

Revert "Prevent chrome://net-internals/#export from flickering"

This reverts commit b55be9ede35c10a2623c3c348768db92069d7f10.

This broke layout of the filter box in the events tab.

Reverted CL description:

The problem:

1. Initially all the tabs are visible
2. A layout happens
3. index.js is run and it sets all the tabs to display: none
This results in the flickering.

By initially giving div main-tab-contents the style display: none and
removing that in initTabs_() we can prevent the flickering.

BUG=466068
Committed: https://crrev.com/b55be9ede35c10a2623c3c348768db92069d7f10
Cr-Commit-Position: refs/heads/master@{#320264}

TBR=eroman@chromium.org, alexclarke1@chromium.org

Committed: https://crrev.com/f5d6a7049532a82187d4a6ccc330f26182e046ae
Cr-Commit-Position: refs/heads/master@{#321364}

[mmenke, 2015-03-19 14:23:41]

mmenke@chromium.org changed reviewers:
+ alexclarke@chromium.org, eroman@chromium.org

[mmenke, 2015-03-19 14:23:54]

The CQ bit was checked by mmenke@chromium.org

[commit-bot: I haz the power, 2015-03-19 14:24:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019303002/1

[commit-bot: I haz the power, 2015-03-19 16:03:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 16:03:56]

Patchset 1 (id:??) landed as
https://crrev.com/f5d6a7049532a82187d4a6ccc330f26182e046ae
Cr-Commit-Position: refs/heads/master@{#321364}