Snippets are enabled when search suggestions are enabled.

chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsConfig.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsConfig.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsConfig.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsConfig.java
new file mode 100644
index 0000000000000000000000000000000000000000..4397a92ca3a3fba67080d6fa70e44cb9d4152356
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsConfig.java
@@ -0,0 +1,20 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.ntp.snippets;
+
+import org.chromium.chrome.browser.ChromeFeatureList;
+import org.chromium.chrome.browser.preferences.PrefServiceBridge;
+
+/**
+ * Provides configuration details for NTP snippets.
+ */
+public final class SnippetsConfig {
+    private SnippetsConfig() {}
+
+    public static boolean isEnabled() {
+        return ChromeFeatureList.isEnabled(ChromeFeatureList.NTP_SNIPPETS)
+                && PrefServiceBridge.getInstance().isSearchSuggestEnabled();

[dgn, 2016/05/24 16:38:35]

We want to use the material UI (toolbar disabled, etc.) when the NTP_SNIPPETS
flag is set. Rather than disabling it here, we probably want to clear the
snippets and not fetch new ones instead, similar to
https://codereview.chromium.org/1980033002

[Michael van Ouwerkerk, 2016/05/24 16:58:09]

I'm not sure what you meant, but the goal of this CL is as described in the bug:
"When switched off, Zine is completely removed from the UI, i.e. the NTP does
not have a peeking card and no below-the-fold section."

[dgn, 2016/05/24 18:04:19]

Ah snap I missed that, sorry. So yeah the CL to update the UI without restart
might be a big one.

+    }
+}