Add CommandDispatcher to BrowserViewController.

ios/chrome/browser/ui/ntp/new_tab_page_header_view.h

 // Copyright 2014 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_
 #define IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/ui/toolbar/toolbar_owner.h"
 
 @protocol GoogleLandingDataSource;
 
 // Header view for the Material Design NTP. The header view contains all views
 // that are displayed above the list of most visited sites, which includes the
 // toolbar buttons, Google doodle, and fake omnibox.
 @interface NewTabPageHeaderView : UICollectionReusableView<ToolbarOwner>
 
 // Return the toolbar view;
 @property(nonatomic, readonly) UIView* toolBarView;
 
 // Creates a NewTabPageToolbarController using the given |toolbarDelegate|,
 // |focuser| and |readingListModel|, and adds the toolbar view to self.
-- (void)addToolbarWithDataSource:(id<GoogleLandingDataSource>)dataSource;
+- (void)addToolbarWithDataSource:(id<GoogleLandingDataSource>)dataSource
+                      dispatcher:(id)dispatcher;
 
 // Changes the frame of |searchField| based on its |initialFrame| and the scroll
 // view's y |offset|. Also adjust the alpha values for |_searchBoxBorder| and
 // |_shadow| and the constant values for the |constraints|.
 - (void)updateSearchField:(UIView*)searchField
          withInitialFrame:(CGRect)initialFrame
        subviewConstraints:(NSArray*)constraints
                 forOffset:(CGFloat)offset;
 
 // Initializes |_searchBoxBorder| and |_shadow| and adds them to |searchField|.
 - (void)addViewsToSearchField:(UIView*)searchField;
 
 // Animates |_shadow|'s alpha to 0.
 - (void)fadeOutShadow;
 
 // Hide toolbar subviews that should not be displayed on the new tab page.
 - (void)hideToolbarViewsForNewTabPage;
 
 // Updates the toolbar tab count;
 - (void)setToolbarTabCount:(int)tabCount;
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_