Roll Protobuf r415:r423.

Roll Protobuf r415:r423.                                                                                                                                                                                                                                                         

1) Got an upstream diff 415:423 from svn
2) Applied
3) Updated protobuf.gyp

Changelog:

r423 Add support for NaCl in atomicops.
r422 Fix issue/333. skip any escaped characters in quotes.
r421 -lz in protobuf.pc belongs in Libs.private, not Libs 
r420 set _VARDADIC_MAX=10 preprocessor definition to make test pass in vc11.
r419 Allow configure to disable maintainer mode 
r418 Update atomicops to support new platforms where intptr_t = long.
r417 Fix a NULL/bool conversion.
r416 Fix issue 378

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=148557

[Nico, 2012-07-20 17:25:44]

LGTM stamp

If you're in the mood, you could include a small changelog in the CL
description, like so:
http://svnsearch.org/svnsearch/repos/CHROMIUM/search?logMessage=roll%20gyp

If this is for the static initializer bug, add  a "BUG=94925" line.

[commit-bot: I haz the power, 2012-07-26 11:53:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pliard@chromium.org/10793026/4002

[commit-bot: I haz the power, 2012-07-26 12:51:24]

Try job failure for 10793026-4002 (retry) on linux_rel for step "browser_tests".
It's a second try, previously, step "browser_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[commit-bot: I haz the power, 2012-07-26 13:37:41]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pliard@chromium.org/10793026/4002

[commit-bot: I haz the power, 2012-07-26 16:06:44]

Change committed as 148557