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

ui/gfx/render_text_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 "ui/gfx/render_text_mac.h"
 
 #import <AppKit/AppKit.h>
 #include <ApplicationServices/ApplicationServices.h>
 #include <CoreText/CoreText.h>
 
@@ skipping 11 matching lines @@
 #include "third_party/skia/include/ports/SkTypeface_mac.h"
 
 namespace {
 
 // This function makes a copy of |font| with the given symbolic traits. On OSX
 // 10.11, CTFontCreateCopyWithSymbolicTraits has the right behavior but
 // CTFontCreateWithFontDescriptor does not. The opposite holds true for OSX
 // 10.10.
 base::ScopedCFTypeRef<CTFontRef> CopyFontWithSymbolicTraits(CTFontRef font,
                                                             int sym_traits) {
-  if (base::mac::IsOSElCapitanOrLater()) {
+  if (base::mac::IsAtLeastOS10_11()) {
     return base::ScopedCFTypeRef<CTFontRef>(CTFontCreateCopyWithSymbolicTraits(
         font, 0, nullptr, sym_traits, sym_traits));
   }
 
   base::ScopedCFTypeRef<CTFontDescriptorRef> orig_desc(
       CTFontCopyFontDescriptor(font));
   base::ScopedCFTypeRef<CFDictionaryRef> orig_attributes(
       CTFontDescriptorCopyAttributes(orig_desc));
   // Make a mutable copy of orig_attributes.
   base::ScopedCFTypeRef<CFMutableDictionaryRef> attributes(
@@ skipping 399 matching lines @@
 }
 
 void RenderTextMac::InvalidateStyle() {
   line_.reset();
   attributes_.reset();
   runs_.clear();
   runs_valid_ = false;
 }
 
 }  // namespace gfx