Enable search engine promo by default

BUG=712831

Review-Url: https://codereview.chromium.org/2957193002
Cr-Commit-Position: refs/heads/master@{#482769}

chrome/browser/android/chrome_feature_list.cc

diff --git a/chrome/browser/android/chrome_feature_list.cc b/chrome/browser/android/chrome_feature_list.cc
index c3bd542..608c851 100644
--- a/chrome/browser/android/chrome_feature_list.cc
+++ b/chrome/browser/android/chrome_feature_list.cc
@@ -186,10 +186,10 @@
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kSearchEnginePromoExistingDevice{
-    "SearchEnginePromo.ExistingDevice", base::FEATURE_DISABLED_BY_DEFAULT};
+    "SearchEnginePromo.ExistingDevice", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kSearchEnginePromoNewDevice{
-    "SearchEnginePromo.NewDevice", base::FEATURE_DISABLED_BY_DEFAULT};
+    "SearchEnginePromo.NewDevice", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kNewPhotoPicker{"NewPhotoPicker",
                                     base::FEATURE_DISABLED_BY_DEFAULT};