Change PRESUBMIT to try more cls on android

Change PRESUBMIT to try more cls on android

- android doesn't currently build anything in chrome/
  so we're changing try job logic to send builds to android
  unless the CL was exclusively in chrome/

Previously we would have built on roughly 20% of cls with 'git try'
After this change we will build on roughly 60% of cls (based on last 10k
commits)

BUG=
TEST=


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=144841

[M-A Ruel, 2012-06-28 22:36:32]

lgtm

[commit-bot: I haz the power, 2012-06-28 22:40:04]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ilevy@chromium.org/10694029/1

[John Grabowski, 2012-06-28 22:48:41]

https://chromiumcodereview.appspot.com/10694029/diff/1/PRESUBMIT.py
File PRESUBMIT.py (right):

https://chromiumcodereview.appspot.com/10694029/diff/1/PRESUBMIT.py#newcode483
PRESUBMIT.py:483: if not files:
unnecessary

[John Grabowski, 2012-06-28 22:51:29]

https://chromiumcodereview.appspot.com/10694029/diff/1/PRESUBMIT.py
File PRESUBMIT.py (right):

https://chromiumcodereview.appspot.com/10694029/diff/1/PRESUBMIT.py#newcode483
PRESUBMIT.py:483: if not files:
On 2012/06/28 22:48:41, John Grabowski wrote:
> unnecessary

Hmm... all([]) is True.  Unexpected.

[commit-bot: I haz the power, 2012-06-29 00:09:04]

Change committed as 144841