Remove WebToolbarDelegate from GoogleLandingDataSource.

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

 // 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.
 
 #import "ios/chrome/browser/ui/ntp/new_tab_page_header_view.h"
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
 #import "ios/chrome/browser/tabs/tab_model_observer.h"
@@ skipping 51 matching lines @@
 
 - (void)reparentToolbarController {
   [self addSubview:[_toolbarController view]];
 }
 
 - (void)addToolbarWithDataSource:(id<GoogleLandingDataSource>)dataSource {
   DCHECK(!_toolbarController);
   DCHECK(dataSource);
 
   _toolbarController.reset([[NewTabPageToolbarController alloc]
-      initWithToolbarDelegate:[dataSource toolbarDelegate]
-                      focuser:dataSource]);
+      initWithToolbarDataSource:dataSource]);
   _toolbarController.get().readingListModel = [dataSource readingListModel];
 
   UIView* toolbarView = [_toolbarController view];
   CGRect toolbarFrame = self.bounds;
   toolbarFrame.size.height = ntp_header::kToolbarHeight;
   toolbarView.frame = toolbarFrame;
   [toolbarView setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
-  [self hideToolbarViewsForNewTabPage];
 
   [self setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
   [self addSubview:[_toolbarController view]];
 }
 
+- (void)setCanGoForward:(BOOL)canGoForward {
+  [_toolbarController setCanGoForward:canGoForward];
+  [self hideToolbarViewsForNewTabPage];
+}
+
+- (void)setCanGoBack:(BOOL)canGoBack {
+  [_toolbarController setCanGoBack:canGoBack];
+  [self hideToolbarViewsForNewTabPage];
+}
+
 - (void)hideToolbarViewsForNewTabPage {
   [_toolbarController hideViewsForNewTabPage:YES];
 };
 
 - (void)setToolbarTabCount:(int)tabCount {
   [_toolbarController setTabCount:tabCount];
 }
 
 - (void)addViewsToSearchField:(UIView*)searchField {
   [searchField setBackgroundColor:[UIColor whiteColor]];
@@ skipping 61 matching lines @@
 }
 
 - (void)fadeOutShadow {
   [UIView animateWithDuration:ios::material::kDuration1
                    animations:^{
                      [_shadow setAlpha:0];
                    }];
 }
 
 @end