base::mac::IsOSSierra() -> base::mac::IsOS10_12(), etc.

chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.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.
 
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.h"
 
 #include <cmath>
 
 #include "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 302 matching lines @@
   }
 
   [NSAnimationContext beginGrouping];
   // Don't use the GTM addition for the "Steve" slowdown because this can
   // happen async from user actions and the effects could be a surprise.
   [[NSAnimationContext currentContext] setDuration:kShrinkAnimationDuration];
   // When using the animator to update |popup_| on El Capitan, for some reason
   // the window does not get redrawn. Use a completion handler to make sure
   // |popup_| gets redrawn once the animation completes. See
   // http://crbug.com/538590 and http://crbug.com/551007 .
-  if (base::mac::IsOSElCapitanOrLater()) {
+  if (base::mac::IsAtLeastOS10_11()) {
     NSWindow* popup = popup_.get();
     [[NSAnimationContext currentContext] setCompletionHandler:^{
       [popup display];
     }];
   }
   [[popup_ animator] setFrame:popup_frame display:YES];
   [NSAnimationContext endGrouping];
 
   if (!animate) {
     // Restore the original animations dictionary.  This does not reinstate any
@@ skipping 25 matching lines @@
   return NSImageFromImageSkia(
       gfx::CreateVectorIcon(vector_icon_id, kIconSize, icon_color));
 }
 
 void OmniboxPopupViewMac::OpenURLForRow(size_t row,
                                         WindowOpenDisposition disposition) {
   DCHECK_LT(row, GetResult().size());
   omnibox_view_->OpenMatch(GetResult().match_at(row), disposition, GURL(),
                            base::string16(), row);
 }