Remove protobuf lite for java.

Remove protobuf lite for java.

Since the introduction of nano protobufs for Java in
https://codereview.chromium.org/532303003 (and updated in
https://codereview.chromium.org/549543002), there is no need for the
lite protocol buffers anymore.

This CL removes the checked out files initially introduced when
protobuf lite support for Java was added in
https://chromiumcodereview.appspot.com/11347026 and cleans up the
infrastructure regarding generating protocol buffers.

Since lite is not supported anymore, this also removes the requirement
for setting the 'proto_runtime' variable for targets using
build/protoc_java.gypi.

BUG=377891
TBR=zea@chromium.org

Committed: https://crrev.com/cca2bcd58f7fe1ef6100265c0d2f40e9c5e23f8c
Cr-Commit-Position: refs/heads/master@{#294453}

[nyquist, 2014-09-09 18:46:13]

nyquist@chromium.org changed reviewers:
+ yfriedmanc@chromium.org

[nyquist, 2014-09-09 18:46:14]

yfriedman: PTAL

[Yaron, 2014-09-09 18:55:11]

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

[Yaron, 2014-09-09 18:55:11]

lgtm

[nyquist, 2014-09-09 20:26:31]

nyquist@chromium.org changed reviewers:
- yfriedmanc@chromium.org

[nyquist, 2014-09-09 20:31:27]

nyquist@chromium.org changed reviewers:
+ brettw@chromium.org, zea@chromium.org

[nyquist, 2014-09-09 20:31:28]

brettw: third_party/protobuf
zea: third_party/cacheinvalidation

[brettw, 2014-09-09 20:37:34]

rs lgtm

[nyquist, 2014-09-11 18:30:06]

The CQ bit was checked by nyquist@chromium.org

[nyquist, 2014-09-11 18:30:39]

The CQ bit was unchecked by nyquist@chromium.org

[nyquist, 2014-09-11 18:41:19]

The CQ bit was checked by nyquist@chromium.org

[commit-bot: I haz the power, 2014-09-11 18:44:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/556933002/20001

[commit-bot: I haz the power, 2014-09-11 20:13:51]

Committed patchset #3 (id:20001) as d4c45be0368ecc7dc567a0ee6baf12892d4b4402

[commit-bot: I haz the power, 2014-09-11 20:19:37]

Patchset 3 (id:??) landed as
https://crrev.com/cca2bcd58f7fe1ef6100265c0d2f40e9c5e23f8c
Cr-Commit-Position: refs/heads/master@{#294453}