Revert of Several Tick counter improvements.

Revert of Several Tick counter improvements. (patchset #8 id:140001 of https://codereview.webrtc.org/1415923010/ )

Reason for revert:
Potentially breaks a threading test under DrMemory.  Rolling back while I investigate.

Original issue's description:
> Several Tick counter improvements.
>
> Move logic into cc file
> Simplify interval calculation
> Remove unused QUERY_PERFORMANCE_COUNTER windows implementation
> Remove double divide on each ::Now() invocation on mac
>
> Move TickTime and TickInterval funcitons to cc file in prep for refactoring.
>
> BUG=
> R=mflodman@webrtc.org, pbos@webrtc.org
>
> Committed: https://crrev.com/4c27e4b62da2047063d88eedfeec3e939fea7843
> Cr-Commit-Position: refs/heads/master@{#10661}

TBR=pbos@webrtc.org,mflodman@webrtc.org,noahric@chromium.org,thaloun@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/c91d1738709b038fee84d569180cba2bbcbfe5d7
Cr-Commit-Position: refs/heads/master@{#10663}

[thaloun, 2015-11-17 00:27:07]

Created Revert of Several Tick counter improvements.

[commit-bot: I haz the power, 2015-11-17 00:27:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1450203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1450203002/1

[commit-bot: I haz the power, 2015-11-17 00:27:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-11-17 00:27:18]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[noahric, 2015-11-17 00:28:05]

The CQ bit was checked by noahric@chromium.org

[noahric, 2015-11-17 00:28:06]

lgtm

[commit-bot: I haz the power, 2015-11-17 00:28:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1450203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1450203002/1

[commit-bot: I haz the power, 2015-11-17 00:28:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-17 00:29:06]

Patchset 1 (id:??) landed as
https://crrev.com/c91d1738709b038fee84d569180cba2bbcbfe5d7
Cr-Commit-Position: refs/heads/master@{#10663}

[pbos-webrtc, 2015-11-17 10:59:03]

On 2015/11/17 00:29:06, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/c91d1738709b038fee84d569180cba2bbcbfe5d7
> Cr-Commit-Position: refs/heads/master@{#10663}

Already tracked here: https://bugs.chromium.org/p/webrtc/issues/detail?id=5199

Please re-land. :)