Android WebView: use right variable for android src dir.

Android WebView: use right variable for android src dir.

The Android build system already defines $(PWD) to be the top of the
source directory as an absolute path, so there's no need for us to
define our own $(GYP_ABS_ANDROID_TOP_DIR) which was being used
incorrectly in some other cases. Replace it in GYP_DEFINES.

BUG=
R=mnaganov@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=202530

[Torne, 2013-05-28 10:50:53]

Hi Ben,

I want to get rid of GYP_ABS_ANDROID_TOP_DIR because we're using it wrongly in
some places, and there's already a variable that has the same contents in the
Android build system. These references here are the only ones in the Chromium
source (the rest come from the gyp generator, I'm working on another CL to fix
the problems there).

[Torne, 2013-05-28 10:53:31]

Hi Mikhail, I forgot Ben is on holiday :)

[mnaganov (inactive), 2013-05-28 11:00:31]

LGTM

I guess, the second step will be to update the Android GYP backend?

[Torne, 2013-05-28 11:03:20]

On 2013/05/28 11:00:31, Mikhail Naganov (Chromium) wrote:
> LGTM
> 
> I guess, the second step will be to update the Android GYP backend?

Yeah, I'm preparing a CL for that now and testing that the change fixes the
original problem (builds don't work when OUT_DIR is set to something
non-default).

[Torne, 2013-05-28 11:03:50]

Committed patchset #1 manually as r202530 (presubmit successful).