Add payload checksum to code cache data.

Add payload checksum to code cache data.

R=jochen@chromium.org
BUG=chromium:441896
LOG=N

Committed: https://crrev.com/7819c593e8d7102922d00578ba4b4c8b69a6dce7
Cr-Commit-Position: refs/heads/master@{#26529}

[jochen (gone - plz use gerrit), 2015-02-09 14:11:21]

lgtm

https://codereview.chromium.org/907013002/diff/1/src/serialize.cc
File src/serialize.cc (right):

https://codereview.chromium.org/907013002/diff/1/src/serialize.cc#newcode2491
src/serialize.cc:2491: Checksum(Vector<const byte> payload) {
explicit

https://codereview.chromium.org/907013002/diff/1/src/serialize.cc#newcode2519
src/serialize.cc:2519: };
DISALLOW_COPY_AND_ASSIGN()

https://codereview.chromium.org/907013002/diff/1/src/serialize.cc#newcode2519
src/serialize.cc:2519: };
DISALLOW_COPY_AND_ASSIGN()

[Yang, 2015-02-09 14:20:46]

New patchsets have been uploaded after l-g-t-m from jochen@chromium.org

[Yang, 2015-02-09 14:22:37]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-02-09 14:23:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/907013002/20001

[commit-bot: I haz the power, 2015-02-09 14:49:39]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-09 14:49:58]

Patchset 2 (id:??) landed as
https://crrev.com/7819c593e8d7102922d00578ba4b4c8b69a6dce7
Cr-Commit-Position: refs/heads/master@{#26529}