Selective build clobbering feature (landmines.py and android build scripts).

Selective build clobbering feature (landmines.py and android build scripts).

Adds the ability for devs/troopers/etc. to set 'landmines' in the tree so that
the build will selectively clobber when a builder moves over a revision with such
a change.

This cl has an basis landmines.py, and hooks the clobber mechanism to the android
build scripts.

The relevant cl which implements this for
compile.py is here: https://chromiumcodereview.appspot.com/11234013/

I'm planning to also implement an informational invocation for gclient to let devs know
about any potential landmines so they can decide if they need to clobber.

This previously attempted to land as: https://chromiumcodereview.appspot.com/11175016

R=ilevy@chromium.org,maruel@chromium.org
BUG=121897
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=167595

[iannucci, 2012-11-13 20:34:09]

Fresh new cl from https://codereview.chromium.org/11175016/ :). PTAL

[M-A Ruel, 2012-11-13 21:35:02]

lgtm but wait for Isaac too.

https://codereview.chromium.org/11377141/diff/1/build/gyp_helper.py
File build/gyp_helper.py (right):

https://codereview.chromium.org/11377141/diff/1/build/gyp_helper.py#newcode25
build/gyp_helper.py:25: supported_vars = ( 'CC',
alignment at +4 would make more sense.

[iannucci, 2012-11-13 22:04:06]

https://chromiumcodereview.appspot.com/11377141/diff/1/build/gyp_helper.py
File build/gyp_helper.py (right):

https://chromiumcodereview.appspot.com/11377141/diff/1/build/gyp_helper.py#ne...
build/gyp_helper.py:25: supported_vars = ( 'CC',
On 2012/11/13 21:35:02, Marc-Antoine Ruel wrote:
> alignment at +4 would make more sense.

Done.

[Isaac (away), 2012-11-14 00:25:36]

lgtm

[commit-bot: I haz the power, 2012-11-14 01:12:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/iannucci@chromium.org/11377141/4001

[commit-bot: I haz the power, 2012-11-14 04:59:50]

Change committed as 167595