[ios clean] Fixes Menu Overflow Controls UI

ios/clean/chrome/browser/ui/tools/menu_overflow_controls_stackview.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/tools/menu_overflow_controls_stackview.h"
 
 #import "ios/clean/chrome/browser/ui/toolbar/toolbar_button+factory.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+const CGFloat kStackSpacing = 15.0;
+}
+
 @implementation MenuOverflowControlsStackView
 @synthesize shareButton = _shareButton;
 @synthesize reloadButton = _reloadButton;
 @synthesize stopButton = _stopButton;
+@synthesize starButton = _starButton;
 
 - (instancetype)init {
   if ((self = [super init])) {
-    // PLACEHOLDER: Buttons and UI config is not final and will be improved.
     [self setUpToolbarButtons];
     [self addArrangedSubview:self.shareButton];
+    [self addArrangedSubview:self.starButton];
     [self addArrangedSubview:self.stopButton];
     [self addArrangedSubview:self.reloadButton];
 
+    self.spacing = kStackSpacing;
     self.axis = UILayoutConstraintAxisHorizontal;
     self.distribution = UIStackViewDistributionFillEqually;
   }
   return self;
 }
 
 #pragma mark - Components Setup
 
 - (void)setUpToolbarButtons {
   // Share button.
   self.shareButton = [ToolbarButton shareToolbarButton];
 
   // Reload button.
   self.reloadButton = [ToolbarButton reloadToolbarButton];
 
   // Stop button.
   self.stopButton = [ToolbarButton stopToolbarButton];
+
+  // Star button.
+  self.starButton = [ToolbarButton starToolbarButton];
 }
 
 @end