Set enable_google_now to false

chrome/chrome_features.gypi

Index: chrome/chrome_features.gypi
diff --git a/chrome/chrome_features.gypi b/chrome/chrome_features.gypi
index 3c80aa0af27fccc438fb5c02c339f33fe6a8de47..8ba18d9f0e7490e8d30744da5a17e585a72e4f98 100644
--- a/chrome/chrome_features.gypi
+++ b/chrome/chrome_features.gypi
@@ -17,13 +17,15 @@
         }],
         ['OS=="android" or OS=="ios"', {
           'enable_background%': 0,
-          'enable_google_now%': 0,
         }, {
           'enable_background%': 1,
-          'enable_google_now%': 1,
         }]
       ],
 
+      # Google Now is disabled to prepare for its removal.
+      # http://crbug.com/539674
+      'enable_google_now%': 0,
+
       # Use vulcanized HTML/CSS/JS resources to speed up WebUI (chrome://)
       # pages. https://github.com/polymer/vulcanize
       'use_vulcanize%': 1,