Use the system stdint.h on Windows.

Use the system stdint.h on Windows.

This is now possible since VC2010 and later provide a stdint.h. VC2008
has been deprecated for building Chromium for a full year now.

There are a number of stdint.h implementations in the codebase, some of
which hide others, and most of which are not complete, and some are not
named stdint.h. The one here in icu is pwin32.h and it is the last file
which implements parts of stdint.h which prevents Blink from using the
system stdint.h.

R=jshin@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=228516

[bungeman-chromium, 2013-10-14 13:31:26]

See https://codereview.chromium.org/26358014/ to see the first part of the
effort to move Blink to the system stdint.h. With this change, no work-arounds
are needed, and blink can move to the system stdint.h. See
http://build.chromium.org/p/tryserver.chromium/builders/win_rel/builds/208278
for an example of this patch applied with Blink removing it's own stdint.h, and
compare against the patch in
http://build.chromium.org/p/tryserver.chromium/builders/win_rel/builds/208277
where Blink's stdint.h is removed but the system stdint.h is forced to be
included before pwin32.h (without this patch).

[bungeman-chromium, 2013-10-14 15:40:37]

I took a look at the win failure and it turns out to just be
telemetry_unittests_buildrunner_ignore_1 failing. It looks like it's just that
the bot is still on python2.6 and these tests need python2.7.

[jungshik at Google, 2013-10-14 20:16:09]

On 2013/10/14 15:40:37, bungeman2 wrote:
> I took a look at the win failure and it turns out to just be
> telemetry_unittests_buildrunner_ignore_1 failing. It looks like it's just that
> the bot is still on python2.6 and these tests need python2.7.

I checked the upstream (common/unicode/platform.h) and it does the right thing.
no need to report upstream.
With that, LGTM

[bungeman-chromium, 2013-10-14 20:23:55]

Committed patchset #1 manually as r228516 (presubmit successful).