Remove deprecated wait_util methods.

ios/chrome/browser/ui/omnibox_perftest.mm

 // Copyright (c) 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 <UIKit/UIKit.h>
 
 #include <memory>
 
 #include "base/mac/scoped_nsobject.h"
 #import "base/test/ios/wait_util.h"
@@ skipping 141 matching lines @@
         [[UITextField alloc] initWithFrame:CGRectMake(20, 100, 280, 29)]);
     [textField setBorderStyle:UITextBorderStyleRoundedRect];
     [window_ addSubview:textField];
     base::TimeDelta elapsed = base::test::ios::TimeUntilCondition(
         ^{
           [textField becomeFirstResponder];
         },
         ^bool() {
           return [keyboard_listener_ isKeyboardVisible];
         },
-        nullptr, base::TimeDelta());
+        false, base::TimeDelta());
     base::test::ios::TimeUntilCondition(
         ^{
           [textField resignFirstResponder];
         },
         ^bool() {
           return ![keyboard_listener_ isKeyboardVisible];
         },
-        nullptr, base::TimeDelta());
+        false, base::TimeDelta());
     [textField removeFromSuperview];
     return elapsed;
   }
 
   // Enables the on-screen keyboard as if user has tapped on |textField|.
   // Returns the amount of time it took for the keyboard to appear.
   base::TimeDelta EnableKeyboard(OmniboxTextFieldIOS* textField) {
     return base::test::ios::TimeUntilCondition(
         ^{
           [textField becomeFirstResponder];
         },
         ^bool() {
           return [keyboard_listener_ isKeyboardVisible];
         },
-        nullptr, base::TimeDelta());
+        false, base::TimeDelta());
   }
 
   // Performs necessary cleanup (so next pass of unit test can start from
   // a clean slate) and then exit from |textField| to dismiss keyboard.
   void DisableKeyboard(OmniboxTextFieldIOS* textField) {
     // Busy wait until keyboard is hidden.
     base::test::ios::TimeUntilCondition(
         ^{
           [textField exitPreEditState];
           [textField resignFirstResponder];
         },
         ^bool() {
           return ![keyboard_listener_ isKeyboardVisible];
         },
-        nullptr, base::TimeDelta());
+        false, base::TimeDelta());
   }
 
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
   base::scoped_nsobject<Tab> current_tab_;
   base::scoped_nsobject<TabModel> tab_model_;
   std::unique_ptr<ToolbarModelDelegateIOS> toolbar_model_delegate_;
   std::unique_ptr<ToolbarModelIOS> toolbar_model_ios_;
   base::scoped_nsobject<WebToolbarController> toolbar_;
   base::scoped_nsobject<UIWindow> window_;
   base::scoped_nsobject<KeyboardAppearanceListener> keyboard_listener_;
@@ skipping 55 matching lines @@
         }
         NSLog(@"%2d: %@", index, logMessage);
         return elapsed;
       },
       ^() {
         [textField setText:@""];
         DisableKeyboard(textField);
       });
 }
 }