Remove WebToolbarDelegate from GoogleLandingDataSource.

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

Index: ios/chrome/browser/ui/ntp/new_tab_page_header_view.mm
diff --git a/ios/chrome/browser/ui/ntp/new_tab_page_header_view.mm b/ios/chrome/browser/ui/ntp/new_tab_page_header_view.mm
index a9a519412da9c7a5afbea8479ae889211ed5c3c9..4fe3ce9e6aab743900f5ac14e40296b8f2a876ad 100644
--- a/ios/chrome/browser/ui/ntp/new_tab_page_header_view.mm
+++ b/ios/chrome/browser/ui/ntp/new_tab_page_header_view.mm
@@ -69,8 +69,7 @@ const CGFloat kMaxConstraintConstantDiff = 5;
   DCHECK(dataSource);
 
   _toolbarController.reset([[NewTabPageToolbarController alloc]
-      initWithToolbarDelegate:[dataSource toolbarDelegate]
-                      focuser:dataSource]);
+      initWithToolbarDataSource:dataSource]);
   _toolbarController.get().readingListModel = [dataSource readingListModel];
 
   UIView* toolbarView = [_toolbarController view];
@@ -78,12 +77,21 @@ const CGFloat kMaxConstraintConstantDiff = 5;
   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];
 };