Stop re-adding subviews to keyboard accessory view.

ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm

 // Copyright 2012 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/toolbar/web_toolbar_controller.h"
 
 #import <CoreLocation/CoreLocation.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include <stdint.h>
@@ skipping 1834 matching lines @@
         ui::PAGE_TRANSITION_LINK | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR);
     [self.urlLoader loadURL:GURL(searchURL)
                    referrer:web::Referrer()
                  transition:transition
           rendererInitiated:NO];
   }
 }
 
 - (UIView*)keyboardAccessoryView {
   if (!_keyboardAccessoryView) {
-    // The new keyboard accessory view is only used on iPhones as iPads have a
-    // different pattern regarding keyboard shortcuts.
-    if (experimental_flags::IsKeyboardAccessoryViewWithCameraSearchEnabled() &&
-        !IsIPadIdiom()) {
+    if (experimental_flags::IsKeyboardAccessoryViewWithCameraSearchEnabled()) {
       // The '.' shortcut is left out because the new keyboard accessory view
       // has less free space for the shortcut buttons, and the '.' is already
       // present in the standard iOS keyboard.
       NSArray<NSString*>* buttonTitles = @[ @":", @"-", @"/", kDotComTLD ];
       _keyboardAccessoryView =
           [[NewKeyboardAccessoryView alloc] initWithButtons:buttonTitles
                                                    delegate:self];
     } else {
       NSArray<NSString*>* buttonTitles =
           @[ @":", @".", @"-", @"/", kDotComTLD ];
@@ skipping 601 matching lines @@
 
 - (BOOL)isPrerenderAnimationRunning {
   return _prerenderAnimating;
 }
 
 - (OmniboxTextFieldIOS*)omnibox {
   return _omniBox;
 }
 
 @end