Disable GN in gyp_chromium.

Disable GN in gyp_chromium.

Android is still broken:
 https://chromegw.corp.google.com/i/clank.tot/builders/clang-clankium-tot-builder/builds/23775/steps/runhooks/logs/stdio 

ERROR at the command-line "--gyp_vars":1:29: Invalid token.
data_reduction_fallback_host%="http://compress.googlezip.net:80/" app_manifest_version_name="clang-clankium-tot-builder 33.0.1728.0" gcc_version="46" app_manifest_version_code="1728000" data_reduction_proxy_probe_url%="http://check.googlezip.net/connect" host_os="linux" component="shared_library" clang="1" spdy_proxy_auth_origin%="https://proxy.googlezip.net:443/" order_text_section="/b/build/slave/clang-clankium-tot-builder/build/src/orderfiles/orderfile.out" spdy_proxy_auth_value%="3c1d997267c567617ffe0e1b1ebbeed71398dd27" target_arch="arm" chrome_build_id="none" fastbuild="1" OS="android" android_app_targets="['../clank/native/framework/clank.gyp:clank', '../clank/native/framework/clank.gyp:devtools_resources', '../clank/native/framework/clank.gyp:chrome_test_apk', '../clank/java/geppetto/uiautomator.gyp:chrome_uiautomator_tests']"
                            ^
I have no idea what this is.
Generating gyp files from GN...
< gclient runhooks
ERROR: process exited with code 2
@@@STEP_FAILURE@@@
FATAL 2 != 88

BUG=
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=238519

[Nico, 2013-12-04 01:21:30]

lgtm

[commit-bot: I haz the power, 2013-12-04 01:24:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/brettw@chromium.org/99963007/1

[commit-bot: I haz the power, 2013-12-04 01:28:48]

Change committed as 238519