Revert "Reduce max possible size of map that holds encoded frame info."
Revert "Reduce max possible size of map that holds encoded frame info."

This reverts commit 2ff7ecfceb99deb3f2351c4184f84c1322568087.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Reduce max possible size of map that holds encoded frame info.
> 
> Bug: webrtc:8375
> Change-Id: Idc57e68dc44fd73e5c0aa85d82c1e3659d8ea292
> Reviewed-on: https://webrtc-review.googlesource.com/8301
> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
> Reviewed-by: Erik Språng <sprang@webrtc.org>
> Commit-Queue: Åsa Persson <5ff7466874d1fe71d5fe7d79a8a23f5ef50662da@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#20232}

TBR=brandtr@webrtc.org,5ff7466874d1fe71d5fe7d79a8a23f5ef50662da@webrtc.org,sprang@webrtc.org

Change-Id: I1dcb7ab588e5ab3eb79bec2c39f615480e31c3bb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:8375
Reviewed-on: https://webrtc-review.googlesource.com/8460
Reviewed-by: Åsa Persson <5ff7466874d1fe71d5fe7d79a8a23f5ef50662da@webrtc.org>
Commit-Queue: Åsa Persson <5ff7466874d1fe71d5fe7d79a8a23f5ef50662da@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#20247}
TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc