Restore code removed temporarily for refactoring on WebApplicationCacheHost in Blink

Restore code removed temporarily for refactoring on WebApplicationCacheHost in Blink

To land Blink 183121 which changes the signature of
WebApplicationCacheHost::didReceiveDataForMainResource(), we had to
duplicate implementation in Chromium side. We chose to just remove the
implementation temporarily and restore after the Blink side change gets
rolled since the implementation was empty.

BUG=418885
Committed: https://crrev.com/4ff13d2f9ec739eebc23f44d14296fb6a4c16871
Cr-Commit-Position: refs/heads/master@{#300854}

[tyoshino (SeeGerritForStatus), 2014-10-22 06:48:21]

tyoshino@chromium.org changed reviewers:
+ jam@chromium.org

[jam, 2014-10-22 22:43:41]

lgtm

[tyoshino (SeeGerritForStatus), 2014-10-23 05:55:37]

The CQ bit was checked by tyoshino@chromium.org

[commit-bot: I haz the power, 2014-10-23 05:56:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/666563004/40001

[commit-bot: I haz the power, 2014-10-23 07:50:54]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2014-10-23 07:51:40]

Patchset 3 (id:??) landed as
https://crrev.com/4ff13d2f9ec739eebc23f44d14296fb6a4c16871
Cr-Commit-Position: refs/heads/master@{#300854}