[tab_container] Hack-in fix for broken constraint on animation

ios/clean/chrome/browser/ui/tab/tab_container_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/tab_container_view_controller.h"
 
 #import "ios/clean/chrome/browser/ui/tab_strip/tab_strip_events.h"
 #import "ios/clean/chrome/browser/ui/ui_types.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 CGFloat kToolbarHeight = 44.0f;
-CGFloat kTabStripHeight = 200.0f;
+CGFloat kTabStripHeight = 90.0f;
 }
 
 @interface TabContainerViewController ()
 
 // Container views for child view controllers. The child view controller's
 // view is added as a subview that fills it's container view via autoresizing.
 @property(nonatomic, strong) UIView* tabStripView;
 @property(nonatomic, strong) UIView* toolbarView;
 @property(nonatomic, strong) UIView* contentView;
 
@@ skipping 279 matching lines @@
         constraintEqualToAnchor:self.view.leadingAnchor],
     [self.toolbarView.trailingAnchor
         constraintEqualToAnchor:self.view.trailingAnchor],
     self.toolbarHeightConstraint,
     [self.toolbarView.bottomAnchor
         constraintEqualToAnchor:self.bottomLayoutGuide.topAnchor],
   ];
 }
 
 @end