Remove IsRunningOnIOS9OrLater() check from omnibox_text_field_ios

ios/chrome/browser/ui/omnibox/omnibox_text_field_ios.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 "ios/chrome/browser/ui/omnibox/omnibox_text_field_ios.h"
 
 #import <CoreText/CoreText.h>
 
 #include "base/command_line.h"
-#include "base/ios/ios_util.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/grit/components_scaled_resources.h"
 #include "components/omnibox/browser/autocomplete_input.h"
 #include "ios/chrome/browser/autocomplete/autocomplete_scheme_classifier_impl.h"
 #import "ios/chrome/browser/ui/animation_util.h"
 #include "ios/chrome/browser/ui/omnibox/omnibox_util.h"
@@ skipping 250 matching lines @@
 
     if ([NSLocale characterDirectionForLanguage:lang] ==
         NSLocaleLanguageDirectionRightToLeft) {
       return NSTextAlignmentRight;
     }
   }
   return NSTextAlignmentLeft;
 }
 
 - (NSTextAlignment)bestTextAlignment {
-  if (!base::ios::IsRunningOnIOS9OrLater() || [self isFirstResponder]) {
+  if ([self isFirstResponder]) {
     return [self bestAlignmentForText:[self text]];
   }
   return NSTextAlignmentNatural;
 }
 
 - (NSTextAlignment)preEditTextAlignment {
   // If the pre-edit text is wider than the omnibox, right-align the text so it
   // ends at the same x coord as the blue selection box.
   CGSize textSize =
       [_preEditStaticLabel.get().text cr_pixelAlignedSizeWithFont:_font];
@@ skipping 751 matching lines @@
   // Disable the RTL arrow menu item. The omnibox sets alignment based on the
   // text in the field, and should not be overridden.
   if ([NSStringFromSelector(action) hasPrefix:@"makeTextWritingDirection"]) {
     return NO;
   }
 
   return [super canPerformAction:action withSender:sender];
 }
 
 @end