Reland of Update NTP to new material design spec.

chrome/browser/android/chrome_feature_list.cc

Index: 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 7fab0a430d706712ca1c9648fbba77ee294a5468..84d326cbf2905efca4e17cd8dc7efd2e18120543 100644
--- a/chrome/browser/android/chrome_feature_list.cc
+++ b/chrome/browser/android/chrome_feature_list.cc
@@ -32,6 +32,7 @@
     &kImportantSitesInCBD,
     &kMediaStyleNotification,
     &kNTPFakeOmniboxTextFeature,
+    &kNTPMaterialDesign,
     &kNTPOfflinePagesFeature,
     &kNTPSnippetsFeature,
     &kNTPToolbarFeature,
@@ -47,6 +48,9 @@
 const base::Feature kMediaStyleNotification {
   "MediaStyleNotification", base::FEATURE_DISABLED_BY_DEFAULT
 };
+
+const base::Feature kNTPMaterialDesign{"NTPMaterialDesign",
+                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kNTPOfflinePagesFeature {
   "NTPOfflinePages", base::FEATURE_DISABLED_BY_DEFAULT