[NTP Snippets] Make a base::Feature instead of raw cmdline flag

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

 // Copyright 2015 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;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 678 matching lines @@
         removeSnapshotDatabase();
         if (mToolbarManager != null) {
             String simpleName = getClass().getSimpleName();
             RecordHistogram.recordTimesHistogram("MobileStartup.ToolbarInflationTime." + simpleName,
                     mInflateInitialLayoutDurationMs, TimeUnit.MILLISECONDS);
             mToolbarManager.onDeferredStartup(getOnCreateTimestampMs(), simpleName);
         }
         recordKeyboardLocaleUma();
 
         // TODO(treib): Remove this when we have the proper morning reads fetching logic in place
-        if (CommandLine.getInstance().hasSwitch(ChromeSwitches.ENABLE_NTP_SNIPPETS)) {
+        if (ChromeFeatureList.isEnabled(ChromeFeatureList.NTP_SNIPPETS)) {
             // Initialize snippets
             SnippetsController.get(this).fetchSnippets(false);
         }
     }
 
     @Override
     public void onStart() {
         super.onStart();
         if (mContextReporter != null) mContextReporter.enable();
 
@@ skipping 913 matching lines @@
     public static int getThemeId() {
         boolean useLowEndTheme =
                 SysUtils.isLowEndDevice() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
         return (useLowEndTheme ? R.style.MainTheme_LowEnd : R.style.MainTheme);
     }
 
     private void setLowEndTheme() {
         if (getThemeId() == R.style.MainTheme_LowEnd) setTheme(R.style.MainTheme_LowEnd);
     }
 }