Disable the settings app by default.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 9e90c3a14b7d67421a4d446eb4aa2f4b854af983..c9fa7dac46a854eb7f8c10c5e524fd9ac6343322 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -407,6 +407,8 @@
       'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/x86',
       'wix_path%': '<(DEPTH)/third_party/wix',
 
+      'enable_settings_app%': 0,
+
       'conditions': [
         # TODO(epoger): Figure out how to set use_skia=1 for Mac outside of
         # the 'conditions' clause.  Initial attempts resulted in chromium and
@@ -572,13 +574,6 @@
           # where possible to reduce ROM size.
           'use_system_libjpeg%': '<(android_build_type)',
         }],
-
-        # Enable Settings App only on Windows.
-        ['enable_app_list==1 and OS=="win"', {
-          'enable_settings_app%': 1,
-        }, {
-          'enable_settings_app%': 0,
-        }],
       ],
 
       # Set this to 1 to use the Google-internal file containing