[tab_container] Consolidate tabStrip into tab_container.

ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm

 // Copyright 2016 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.
 
 // ======                        New Architecture                         =====
 // =         This code is only used in the new iOS Chrome architecture.       =
 // ============================================================================
 
 #import "ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.h"
 
@@ skipping 78 matching lines @@
 
 - (void)viewWillAppear:(BOOL)animated {
   [self.grid reloadData];
   self.floatingNewTabButton = [MDCFloatingButton cr_tabGridNewTabButton];
   [self.floatingNewTabButton
       setFrame:[MDCFloatingButton
                    cr_frameForTabGridNewTabButtonInRect:self.view.bounds]];
   [self.view addSubview:self.floatingNewTabButton];
 }
 
+- (UIStatusBarStyle)preferredStatusBarStyle {
+  return UIStatusBarStyleLightContent;
+}
+
 #pragma mark - UICollectionViewDataSource methods
 
 - (NSInteger)numberOfSectionsInCollectionView:
     (UICollectionView*)collectionView {
   return 1;
 }
 
 - (NSInteger)collectionView:(UICollectionView*)collectionView
      numberOfItemsInSection:(NSInteger)section {
   return [self.dataSource numberOfTabsInTabGrid];
@@ skipping 45 matching lines @@
 
 - (void)cellPressed:(UICollectionViewCell*)cell {
   [self.tabCommandHandler showTabAtIndexPath:[self.grid indexPathForCell:cell]];
 }
 
 - (void)deleteButtonPressedForCell:(UICollectionViewCell*)cell {
   // PLACEHOLDER: handle close tab button.
 }
 
 @end