diff --git a/common.gypi b/common.gypi
index e5315999a..cc4b50c66 100644
--- a/common.gypi
+++ b/common.gypi
@@ -66,6 +66,8 @@
     'toolkit_views%': 0,
 
     'linux2%': 0,
+    
+    'chrome_personalization%': 0,
   },
   'target_defaults': {
     'conditions': [
@@ -85,6 +87,9 @@
       ['linux2==1', {
         'defines': ['LINUX2=1'],
       }],
+      ['chrome_personalization==1', {
+        'defines': ['CHROME_PERSONALIZATION=1'],
+      }],
       ['coverage!=0', {
         'conditions': [
           ['OS=="mac"', {