[ios clean] Toolbar displays total number of tabs.

ios/clean/chrome/browser/ui/toolbar/toolbar_constants.mm

 // Copyright 2017 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.
 
 #import "ios/clean/chrome/browser/ui/toolbar/toolbar_constants.h"
 
-const CGFloat kToolbarBackgroundBrightness = 242.0 / 255.0;
+const CGFloat kToolbarBackgroundColor = 0xF2F2F2;
 
 const CGFloat kVerticalMargin = 7.0f;
 const CGFloat kHorizontalMargin = 1.0f;
 const CGFloat kStackViewSpacing = 2.0f;
 
 const CGFloat kLocationBarBorderWidth = 1.0f;
-const CGFloat kLocationBarBorderColorBrightness = 208.0 / 255.0;
+const CGFloat kLocationBarBorderColor = 0xD0D0D0;
 const CGFloat kLocationBarShadowRadius = 0.0f;
 const CGFloat kLocationBarShadowOpacity = 0.2f;
 
 const CGFloat kProgressBarHeight = 2.0f;
 
 const CGFloat kToolbarButtonWidth = 42.0f;
+const CGFloat kToolbarButtonTitleNormalColor = 0x555555;
+const CGFloat kToolbarButtonTitleHighlightedColor = 0x4285F4;
+
+const NSInteger kShowTabStripButtonMaxTabCount = 99;
+
+const NSInteger kFontSizeFewerThanTenTabs = 11;
+const NSInteger kFontSizeTenTabsOrMore = 9;