Removing unused Births methods and unnecessary link from chrome://profiler

Removing unused Births methods and unnecessary link from chrome://profiler.

Removing [Reset tracking data] was approved by jar@. It was never fully implemented (only for the browser process) and is superseded by taking and comparing snapshots in chrome://profiler tab.

BUG=456354
Committed: https://crrev.com/0b8f5a8f335e6de9e80e13e315b4e3f7f6460079
Cr-Commit-Position: refs/heads/master@{#319770}

[vadimt, 2015-03-05 23:57:26]

vadimt@chromium.org changed reviewers:
+ isherman@chromium.org

[vadimt, 2015-03-05 23:57:27]

isherman@, please pre-review

[Ilya Sherman, 2015-03-06 00:07:27]

LGTM

[vadimt, 2015-03-06 00:08:43]

vadimt@chromium.org changed reviewers:
+ cpu@chromium.org

[vadimt, 2015-03-06 00:08:43]

cpu@chromium.org: Please provide OWNER's approval

[cpu_(ooo_6.6-7.5), 2015-03-09 20:24:16]

lgtm

[vadimt, 2015-03-09 20:24:35]

The CQ bit was checked by vadimt@chromium.org

[commit-bot: I haz the power, 2015-03-09 20:24:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/980333004/1

[commit-bot: I haz the power, 2015-03-09 23:36:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-09 23:37:36]

Patchset 1 (id:??) landed as
https://crrev.com/0b8f5a8f335e6de9e80e13e315b4e3f7f6460079
Cr-Commit-Position: refs/heads/master@{#319770}