Fix mangled function names.

Fix conflicts in our function mangling.
This change changes zlib.h to prevent it from mangling some functions twice on x64. It also adds a 'google.patch' file, a diff file from the original zlib.

BUG=30703
TEST=build Chromium on the "Chromium Linux Builder (valgrind)" bot.
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=117019

[Hironori Bono, 2011-12-19 04:29:53]

Greetings,

Sorry, I did not notice this problem because it happens only on Linux, which
does not use our copy of zlib 1.2.5. Is it possible to review this change? (Even
though Linux does not use our copy of zlib 1.2.5, we will use it on our valgrind
bots.)

Regards,

Hironori Bono

[agl, 2011-12-19 15:06:54]

The patch file should be made with the -u option to diff.

Also, the patch file mentions several files that aren't updated in this change.
If we include them in the tree, we should update them. Otherwise, we should
remove them from the patch file.

[Hironori Bono, 2011-12-21 07:43:02]

Greetings,

Many thanks for your review and comment. I totally forgot removing the files not
updated by change. I have re-created a 'google.patch' file and removed files not
included in this change. (It includes a diff for 'zconf.h' since it includes
'mozzconf.h'.) Is it possible to take another look?

Regards,

Hironori Bono

[agl, 2011-12-21 14:46:28]

Seems consistent now. It actually builds and works then LGTM.

[commit-bot: I haz the power, 2011-12-22 10:46:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hbono@chromium.org/8954009/16001

[commit-bot: I haz the power, 2011-12-22 11:47:25]

Try job failure for 8954009-16001 (retry) on linux_rel for step "ui_tests".
It's a second try, previously, step "ui_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...