[Herb] Set up field trial for UI prototypes

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarPhone.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.toolbar;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
@@ skipping 36 matching lines @@
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.compositor.Invalidator;
 import org.chromium.chrome.browser.compositor.layouts.LayoutUpdateHost;
 import org.chromium.chrome.browser.ntp.NewTabPage;
 import org.chromium.chrome.browser.omnibox.LocationBar;
 import org.chromium.chrome.browser.omnibox.LocationBarPhone;
 import org.chromium.chrome.browser.omnibox.UrlContainer;
 import org.chromium.chrome.browser.partnercustomizations.HomepageManager;
-import org.chromium.chrome.browser.preferences.ChromePreferenceManager;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.util.ColorUtils;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.MathUtils;
 import org.chromium.chrome.browser.widget.TintedImageButton;
 import org.chromium.chrome.browser.widget.newtab.NewTabButton;
 import org.chromium.ui.base.LocalizationUtils;
 import org.chromium.ui.interpolators.BakedBezierInterpolator;
 
 import java.util.ArrayList;
@@ skipping 2075 matching lines @@
         ((BitmapDrawable) mTabSwitcherAnimationMenuBadgeLightDrawable).setGravity(Gravity.CENTER);
     }
 
     @Override
     public void setReturnButtonListener(View.OnClickListener listener) {
         mReturnButtonListener = listener;
         mReturnButton.setOnClickListener(listener);
     }
 
     private boolean isReturnButtonVisible() {
-        String herbFlavor = ChromePreferenceManager.getHerbFlavor();
+        String herbFlavor = FeatureUtilities.getHerbFlavor();
         if (!TextUtils.equals(ChromeSwitches.HERB_FLAVOR_BASIL, herbFlavor)
                 && !TextUtils.equals(ChromeSwitches.HERB_FLAVOR_CHIVE, herbFlavor)) {
             return false;
         }
 
         Tab currentTab = getToolbarDataProvider().getTab();
         return mReturnButtonListener != null && currentTab != null
                 && currentTab.isAllowedToReturnToExternalApp();
     }
 
     private void setUseLightDrawablesForTextureCapture() {
         int currentPrimaryColor = getToolbarDataProvider().getPrimaryColor();
         mUseLightDrawablesForTextureCapture = isIncognito()
                 || (currentPrimaryColor != 0
                 && ColorUtils.shoudUseLightForegroundOnBackground(currentPrimaryColor));
     }
 }