Revert of Add WebCache memory usage in Blink to chrome://tracing

Revert of Add WebCache memory usage in Blink to chrome://tracing

Original CL: www.crrev.com/1283793004
Reason for revert: Move to blink.

The memory cache in blink allocates from PartitionAlloc for encoded
data and uses discardable for decoded 8images. To set the
sub-allocation edges correctly, this has to be moved inside blink.
Blink side CL: crrev.com/1327793003.

TBR=thestig@chromium.org, jam@chromium.org
BUG=520842
Committed: https://crrev.com/18ef6deb4977e855c3b91502a231232caadcbde6
Cr-Commit-Position: refs/heads/master@{#347383}

[ssid, 2015-09-02 13:23:17]

ssid@chromium.org changed reviewers:
+ thestig@chromium.org

[ssid, 2015-09-02 13:23:18]

Hi, sorry for the revert of this change. This has to be moved inside blink for
marking sub-allocations in detail.
PTAL, Thanks.

[Primiano Tucci (use gerrit), 2015-09-04 09:14:36]

primiano@chromium.org changed reviewers:
+ primiano@chromium.org

[Primiano Tucci (use gerrit), 2015-09-04 09:14:37]

LGTM, diffed the original cl and this one.
I think you can not bother the owners as this is really a revert of the original
CL.

[ssid, 2015-09-04 10:14:15]

The CQ bit was checked by ssid@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-09-04 10:14:37]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1304073006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1304073006/1

[commit-bot: I haz the power, 2015-09-04 11:32:06]

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

[commit-bot: I haz the power, 2015-09-04 11:32:06]

Dry run: This issue passed the CQ dry run.

[ssid, 2015-09-04 11:36:03]

The CQ bit was checked by ssid@chromium.org

[commit-bot: I haz the power, 2015-09-04 11:36:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1304073006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1304073006/1

[commit-bot: I haz the power, 2015-09-04 11:40:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-04 11:41:51]

Patchset 1 (id:??) landed as
https://crrev.com/18ef6deb4977e855c3b91502a231232caadcbde6
Cr-Commit-Position: refs/heads/master@{#347383}