Change the iPad tab switcher sign in button width.

ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_overlay_view.mm

 // Copyright 2015 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/tab_switcher/tab_switcher_panel_overlay_view.h"
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
@@ skipping 136 matching lines @@
       @"floatingButton" : _floatingButton.get(),
       @"activityIndicator" : _activityIndicator.get(),
     };
     AddSameCenterXConstraint(_container, _textButton);
     AddSameCenterXConstraint(_container, _floatingButton);
     AddSameCenterXConstraint(_container, _activityIndicator);
     NSArray* constraints = @[
       @"V:|-0-[title]-12-[subtitle]-48-[button]-0-|",
       @"V:[subtitle]-35-[floatingButton(==48)]-0-|",
       @"V:[subtitle]-24-[activityIndicator]", @"H:|-[title]-|",
-      @"H:|-[subtitle]-|", @"H:[button(==180)]", @"H:[floatingButton(==48)]"
+      @"H:|-[subtitle]-|", @"H:[button(>=180)]", @"H:[floatingButton(==48)]"
     ];
     ApplyVisualConstraints(constraints, viewsDictionary, _container);
 
     // Sets the container's width relative to the parent.
     ApplyVisualConstraintsWithMetrics(
         @[
           @"H:|-(>=0)-[container(==containerWidth@999)]-(>=0)-|",
         ],
         @{ @"container" : _container.get() },
         @{ @"containerWidth" : @(kContainerWidth) }, self);
@@ skipping 243 matching lines @@
   [self chromeExecuteCommand:command];
 }
 
 - (void)recordMetrics {
   if (!_recordedMetricString.length())
     return;
   base::RecordAction(base::UserMetricsAction(_recordedMetricString.c_str()));
 }
 
 @end