Add CommandDispatcher to BrowserViewController.

ios/chrome/browser/ui/ntp/new_tab_page_toolbar_controller.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_toolbar_controller.h"
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/toolbar/toolbar_model.h"
 #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"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::UserMetricsAction;
 
 namespace {
 
@@ skipping 10 matching lines @@
   NTPToolbarButtonNameForward,
   NumberOfNTPToolbarButtonNames,
 };
 
 }  // namespace
 
 @interface NewTabPageToolbarController () {
   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;
     LayoutRect backButtonLayout =
         LayoutRectMake(kBackButtonLeading, boundingWidth, kButtonYOffset,
                        kBackButtonSize.width, kBackButtonSize.height);
     _backButton.reset(
         [[UIButton alloc] initWithFrame:LayoutRectGetRect(backButtonLayout)]);
     [_backButton
         setAutoresizingMask:UIViewAutoresizingFlexibleTrailingMargin() |
@@ skipping 125 matching lines @@
   } else if (gesture.view == _forwardButton.get()) {
     base::scoped_nsobject<GenericChromeCommand> command(
         [[GenericChromeCommand alloc] initWithTag:IDC_SHOW_FORWARD_HISTORY]);
     [_forwardButton chromeExecuteCommand:command];
   }
 }
 
 - (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