[heap] No leakage of gc-idle-time-handler.h outside of heap.

[heap] No leakage of gc-idle-time-handler.h outside of heap.

This prevents the internal gc-idle-time-handler.h to be usable outisde
of the "heap" directory. The logic inside that component is only useful
within the GC and is now properly encapsulated.

R=ulan@chromium.org

Committed: https://crrev.com/ca5780690ddf3bd79723a2eb492e797fe64d5405
Cr-Commit-Position: refs/heads/master@{#30939}

[ulan, 2015-09-25 12:52:56]

lgtm!

[Michael Starzinger, 2015-09-25 12:59:03]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-09-25 12:59:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1368983002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1368983002/20001

[ulan, 2015-09-25 13:03:00]

On 2015/09/25 12:52:56, ulan wrote:
> lgtm!

This is going to conflict with: https://codereview.chromium.org/1352453004/

[commit-bot: I haz the power, 2015-09-25 13:55:16]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-25 13:55:39]

Patchset 2 (id:??) landed as
https://crrev.com/ca5780690ddf3bd79723a2eb492e797fe64d5405
Cr-Commit-Position: refs/heads/master@{#30939}