Progress bar color is based on toolbar color

chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.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.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Context;
 import android.content.res.Configuration;
@@ skipping 348 matching lines @@
         updateButtonsTint();
         mUrlBar.setUseDarkTextColors(mUseDarkColors);
 
         int titleTextColor = mUseDarkColors
                 ? ApiCompatibilityUtils.getColor(resources, R.color.url_emphasis_default_text)
                 : ApiCompatibilityUtils.getColor(resources,
                         R.color.url_emphasis_light_default_text);
         mTitleBar.setTextColor(titleTextColor);
 
         if (getProgressBar() != null) {
-            if (!mUseDarkColors) {
-                getProgressBar().setBackgroundColor(ColorUtils
-                        .getLightProgressbarBackground(getToolbarDataProvider().getPrimaryColor()));
-                getProgressBar().setForegroundColor(ApiCompatibilityUtils.getColor(resources,
-                        R.color.progress_bar_foreground_white));
+            if (!ColorUtils.isUsingDefaultToolbarColor(getResources(),
+                    getBackground().getColor())) {
+                getProgressBar().setThemeColor(getToolbarDataProvider().getPrimaryColor(), false);
             } else {
                 getProgressBar().setBackgroundColor(ApiCompatibilityUtils.getColor(resources,
                         R.color.progress_bar_background));
                 getProgressBar().setForegroundColor(ApiCompatibilityUtils.getColor(resources,
                         R.color.progress_bar_foreground));
             }
         }
     }
 
     private void updateButtonsTint() {
@@ skipping 281 matching lines @@
 
     @Override
     protected void setAppMenuUpdateBadgeToVisible(boolean animate) {}
 
     @Override
     public View getMenuButtonWrapper() {
         // This class has no menu button wrapper, so return the menu button instead.
         return mMenuButton;
     }
 }