[ios clean] Add overflow buttons for ToolsMenu.

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"
+
+@implementation MenuOverflowControlsStackView
+@synthesize toolsMenuButton = _toolsMenuButton;
+@synthesize shareButton = _shareButton;
+@synthesize reloadButton = _reloadButton;
+@synthesize stopButton = _stopButton;
+
+- (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.stopButton];
+    [self addArrangedSubview:self.reloadButton];
+    [self addArrangedSubview:self.toolsMenuButton];
+
+    self.axis = UILayoutConstraintAxisHorizontal;
+    self.distribution = UIStackViewDistributionFillEqually;
+  }
+  return self;
+}
+
+#pragma mark - Components Setup
+
+- (void)setUpToolbarButtons {
+  // Tools menu button.
+  self.toolsMenuButton = [ToolbarButton toolsMenuToolbarButton];
+
+  // Share button.
+  self.shareButton = [ToolbarButton shareToolbarButton];
+
+  // Reload button.
+  self.reloadButton = [ToolbarButton reloadToolbarButton];
+
+  // Stop button.
+  self.stopButton = [ToolbarButton stopToolbarButton];
+}
+
+@end