Remove ChromeBrowserProvider::CreateInfoBarView() method.

ios/public/provider/chrome/browser/ui/test_infobar_view.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.
-
-#import "ios/public/provider/chrome/browser/ui/test_infobar_view.h"
-
-@implementation TestInfoBarView
-@synthesize visibleHeight = _visibleHeight;
-
-- (NSString*)markedLabel {
-  return @"";
-}
-
-+ (NSString*)stringAsLink:(NSString*)str tag:(NSUInteger)tag {
-  return str;
-}
-
-- (void)resetDelegate {
-}
-
-- (void)addCloseButtonWithTag:(NSInteger)tag
-                       target:(id)target
-                       action:(SEL)action {
-}
-
-- (void)addLeftIcon:(UIImage*)image {
-}
-
-- (void)addPlaceholderTransparentIcon:(CGSize const&)imageSize {
-}
-
-- (void)addLeftIconWithRoundedCornersAndShadow:(UIImage*)image {
-}
-
-- (void)addLabel:(NSString*)label {
-}
-
-- (void)addLabel:(NSString*)label target:(id)target action:(SEL)action {
-}
-
-- (void)addButton1:(NSString*)title1
-              tag1:(NSInteger)tag1
-           button2:(NSString*)title2
-              tag2:(NSInteger)tag2
-            target:(id)target
-            action:(SEL)action {
-}
-
-- (void)addButton:(NSString*)title
-              tag:(NSInteger)tag
-           target:(id)target
-           action:(SEL)action {
-}
-
-- (void)addSwitchWithLabel:(NSString*)label
-                      isOn:(BOOL)isOn
-                       tag:(NSInteger)tag
-                    target:(id)target
-                    action:(SEL)action {
-}
-
-@end