Remove all uses of GG_UINT32_C.

Remove all uses of GG_UINT32_C.

We can use UINT32_C from <stdint.h>, since we force-define
__STDC_CONSTANT_MACROS.

As a "drive-by", also remove all the other uses of GG_... from
media/cast (since I'll do it later anyway).

R=hclam@chromium.org
TBR=brettw@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260816

[Alpha Left Google, 2014-03-31 19:26:43]

lgtm

[viettrungluu, 2014-03-31 23:39:25]

Thanks, Alpha.

brettw --> base approval?

[viettrungluu, 2014-04-01 03:07:05]

brettw --> TBR, because there's a chance the CQ will succeed on this

[viettrungluu, 2014-04-01 03:07:12]

The CQ bit was checked by viettrungluu@chromium.org

[commit-bot: I haz the power, 2014-04-01 03:07:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/viettrungluu@chromium.org/219723003/40001

[commit-bot: I haz the power, 2014-04-01 09:30:09]

Change committed as 260816