libyuv: Switch bots over to GN by default.

scripts/slave/recipe_modules/libyuv/chromium_config.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from recipe_engine.config import BadConf
 
 import DEPS
 CONFIG_CTX = DEPS['chromium'].CONFIG_CTX
 from recipe_engine.config_types import Path
 
@@ skipping 11 matching lines @@
   _libyuv_common(c)
 
 @CONFIG_CTX(includes=['ninja', 'gcc', 'goma'])
 def libyuv_gcc(c):
   _libyuv_common(c)
 
 @CONFIG_CTX(includes=['android'])
 def libyuv_android(c):
   if c.TARGET_ARCH == 'intel' and c.TARGET_BITS == 32:
     c.gyp_env.GYP_DEFINES['android_full_debug'] = 1
+    c.gn_args.append('android_full_debug=true')
 
 @CONFIG_CTX(includes=['android_clang'])
 def libyuv_android_clang(c):
   pass
 
 @CONFIG_CTX(includes=['chromium', 'static_library'])
 def libyuv_ios(c):
   if c.HOST_PLATFORM != 'mac':
     raise BadConf('Only "mac" host platform is supported for iOS (got: "%s")' %
                   c.HOST_PLATFORM)  # pragma: no cover
   if c.TARGET_PLATFORM != 'ios':
     raise BadConf('Only "ios" target platform is supported (got: "%s")' %
                   c.TARGET_PLATFORM)  # pragma: no cover
   c.build_config_fs = c.BUILD_CONFIG + '-iphoneos'
 
   gyp_defs = c.gyp_env.GYP_DEFINES
   gyp_defs['OS'] = c.TARGET_PLATFORM
   if c.TARGET_BITS == 64:
     gyp_defs['target_subarch'] = 'arm64'
-
+  c.gn_args.append('target_os=%s' % c.TARGET_PLATFORM)
   _libyuv_common(c)
 
 def _libyuv_common(c):
-  c.compile_py.default_targets = ['All']
+  c.compile_py.default_targets = []