Set gyp flags to disable various features on iOS

Disables a set of features that aren't available on iOS. These are
being disabled up-front to make it easier to bring up iOS support in
chrome/ gyp files in later CLs.

BUG=None


Review URL: https://chromiumcodereview.appspot.com/10928138

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@156281 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index 65f44f1..f7453f86 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -468,9 +468,14 @@
         }],
 
         ['OS=="ios"', {
-          'enable_automation%': 0,
-          'enable_webrtc%': 0,
+          'configuration_policy%': 0,
           'disable_ftp_support%': 1,
+          'enable_automation%': 0,
+          'enable_extensions%': 0,
+          'enable_printing%': 0,
+          'enable_themes%': 0,
+          'enable_webrtc%': 0,
+          'notifications%': 0,
           'remoting%': 0,
         }],