A couple of cleanups for gyp_chromium

A couple of cleanups for gyp_chromium

Use subprocess.call() rather than Popen + communicate.
The shell argument to Popen defaults to False so was
redundant.

Use any() rather than explicit loop.

Committed: https://crrev.com/bf94627aa3bb2e6d4577dbf27288f15d90dcf68c
Cr-Commit-Position: refs/heads/master@{#330854}

[Sam Clegg, 2015-05-20 22:27:36]

sbc@chromium.org changed reviewers:
+ scottmg@chromium.org

[scottmg, 2015-05-20 22:30:56]

lgtm

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium
File build/gyp_chromium (right):

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium#newcode221
build/gyp_chromium:221: # TODO(bradnelson): take this out once this issue is
fixed:
You might as well delete this TODO too, that's never going to happen.

[Sam Clegg, 2015-05-20 22:38:40]

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium
File build/gyp_chromium (right):

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium#newcode221
build/gyp_chromium:221: # TODO(bradnelson): take this out once this issue is
fixed:
On 2015/05/20 22:30:56, scottmg wrote:
> You might as well delete this TODO too, that's never going to happen.

Its not?  The bug is still open.. there could still be hope?

[Sam Clegg, 2015-05-20 22:39:38]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2015-05-20 22:40:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1144383002/1

[scottmg, 2015-05-20 22:40:45]

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium
File build/gyp_chromium (right):

https://codereview.chromium.org/1144383002/diff/1/build/gyp_chromium#newcode221
build/gyp_chromium:221: # TODO(bradnelson): take this out once this issue is
fixed:
On 2015/05/20 22:38:40, Sam Clegg wrote:
> On 2015/05/20 22:30:56, scottmg wrote:
> > You might as well delete this TODO too, that's never going to happen.
> 
> Its not?  The bug is still open.. there could still be hope?

Sure, ok. :)

[commit-bot: I haz the power, 2015-05-21 00:02:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-21 00:03:55]

Patchset 1 (id:??) landed as
https://crrev.com/bf94627aa3bb2e6d4577dbf27288f15d90dcf68c
Cr-Commit-Position: refs/heads/master@{#330854}