Make android_webview commits only try the android bot.

Make android_webview commits only try the android bot.

The logic in PRESUBMIT.py to only try a single OS bot when the changes
are for a single OS doesn't work for the android_webview directory
because the regex doesn't match at the top level. Tweak the regexes to
allow mac/win/android to be the start of the full path. Now, webview
code is recognised as being android-specific.

R=maruel@chromium.org
NOTRY=true
BUG=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=155217

[Torne, 2012-09-06 17:38:02]

Hi maruel, we just noticed all the android_webview changes are running a lot of
useless try jobs on other platforms; this should fix it :)

[M-A Ruel, 2012-09-06 17:49:58]

Could you list examples where the regexp match or didn't? Got a brain stack
overflow.

[Torne, 2012-09-06 18:13:20]

On 2012/09/06 17:49:58, Marc-Antoine Ruel wrote:
> Could you list examples where the regexp match or didn't? Got a brain stack
> overflow.

It doesn't recognise "android_webview/lib/main/webview_entry_point.cc" as being
Android-specific, because the pathnames are relative to the src directory, and
thus there is no / or _ before the word "android".

[M-A Ruel, 2012-09-06 18:15:11]

On 2012/09/06 18:13:20, Torne wrote:
> On 2012/09/06 17:49:58, Marc-Antoine Ruel wrote:
> > Could you list examples where the regexp match or didn't? Got a brain stack
> > overflow.
> 
> It doesn't recognise "android_webview/lib/main/webview_entry_point.cc" as
being
> Android-specific, because the pathnames are relative to the src directory, and
> thus there is no / or _ before the word "android".

Ok I was confused because there is no such thing as src/win or src/mac but
that's fine with me.

lgtm

[M-A Ruel, 2012-09-06 18:15:42]

On 2012/09/06 18:15:11, Marc-Antoine Ruel wrote:
> lgtm

I kindly fixed your description.

[commit-bot: I haz the power, 2012-09-06 18:15:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/torne@chromium.org/10918102/1

[commit-bot: I haz the power, 2012-09-06 18:17:00]

Change committed as 155217