Enable win64 stub library generation

Enable win64 stub library generation.
Previously, /machine:X86 was the hardcoded lib option.
This patch enables /machine:X64, if the file type parameter is 'windows_lib_x64'. To unblock media <-> ffmpeg win64 linking, this patch along with a separate patch to ffmpeg.gyp will be necessary.

BUG=172938, 166496
TEST=win_rel try bot (win32). Private with additional fix to use 'windows_lib_x64' for win64 in ffmpeg.gyp eliminates media<->ffmpeg link errors in win64. Unittests.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=180184

[wolenetz, 2013-02-01 06:03:51]

Please review.

Thanks!
Matt

[DaleCurtis, 2013-02-01 19:07:40]

https://codereview.chromium.org/12087128/diff/1/tools/generate_stubs/generate...
File tools/generate_stubs/generate_stubs.py (right):

https://codereview.chromium.org/12087128/diff/1/tools/generate_stubs/generate...
tools/generate_stubs/generate_stubs.py:888: default=None,
I think you'll need to keep the old FILE_TYPE_WIN around until you convert all
the GYP's over to use the new syntax; otherwise you've got a chicken and egg
problem.

[wolenetz, 2013-02-01 19:16:21]

https://codereview.chromium.org/12087128/diff/1/tools/generate_stubs/generate...
File tools/generate_stubs/generate_stubs.py (right):

https://codereview.chromium.org/12087128/diff/1/tools/generate_stubs/generate...
tools/generate_stubs/generate_stubs.py:888: default=None,
On 2013/02/01 19:07:40, DaleCurtis wrote:
> I think you'll need to keep the old FILE_TYPE_WIN around until you convert all
> the GYP's over to use the new syntax; otherwise you've got a chicken and egg
> problem.

The neat bit about this change is that I actually did.  See above, where
FILE_TYPE_WIN_X86 is still "windows_lib" for backwards win32 compatibility.  I
added "windows_lib_x64" in this patch, as "FILE_TYPE_WIN_X64".

[DaleCurtis, 2013-02-01 19:22:57]

Ah whoops, yeah I was thinking the Python constant name was the type name not
'windows_lib'.

lgtm

[commit-bot: I haz the power, 2013-02-01 19:45:04]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/wolenetz@chromium.org/12087128/1

[commit-bot: I haz the power, 2013-02-01 20:55:22]

Change committed as 180184