Add CommandDispatcher to BrowserViewController.

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

Index: ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.mm
diff --git a/ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.mm b/ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.mm
index 5b91724b4bedb85f69880c1f3e457a1e14dedf56..48df1af307f2d7cdb99ede1675ec2d5353dea782 100644
--- a/ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.mm
+++ b/ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.mm
@@ -13,6 +13,7 @@
 #import "ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
+#import "ios/chrome/browser/ui/ntp/google_landing_commands.h"
 #import "ios/chrome/browser/ui/ntp/google_landing_data_source.h"
 #import "ios/chrome/browser/ui/rtl_geometry.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_resource_macros.h"
@@ -43,19 +44,17 @@ enum {
   base::scoped_nsobject<UIButton> _backButton;
   base::scoped_nsobject<UIButton> _forwardButton;
   base::scoped_nsobject<UIButton> _omniboxFocuser;
-
-  base::WeakNSProtocol<id<GoogleLandingDataSource>> _dataSource;
 }
 
 @end
 
 @implementation NewTabPageToolbarController
 
-- (instancetype)initWithToolbarDataSource:
-    (id<GoogleLandingDataSource>)dataSource {
+@synthesize dispatcher = _dispatcher;
+
+- (instancetype)initWithToolbar {
   self = [super initWithStyle:ToolbarControllerStyleLightMode];
   if (self) {
-    _dataSource.reset(dataSource);
     [self.backgroundView setHidden:YES];
 
     CGFloat boundingWidth = self.view.bounds.size.width;
@@ -201,18 +200,18 @@ enum {
 - (void)hideViewsForNewTabPage:(BOOL)hide {
   [super hideViewsForNewTabPage:hide];
   // Show the back/forward buttons if there is forward history.
-  BOOL forwardEnabled = [_dataSource canGoForward];
+  BOOL forwardEnabled = [self.dispatcher canGoForward];
   [_backButton setHidden:!forwardEnabled && hide];
-  [_backButton setEnabled:[_dataSource canGoBack]];
+  [_backButton setEnabled:[self.dispatcher canGoBack]];
   [_forwardButton setHidden:!forwardEnabled && hide];
 }
 
 - (void)focusOmnibox:(id)sender {
-  [_dataSource focusFakebox];
+  [self.dispatcher focusFakebox];
 }
 
 - (IBAction)stackButtonTouchDown:(id)sender {
-  [_dataSource prepareToEnterTabSwitcher:self];
+  [self.dispatcher prepareToEnterTabSwitcher:self];
 }
 
 @end