mac: Remove more 10.5-only code

printing/pdf_metafile_cg_mac.cc

 // 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 "printing/pdf_metafile_cg_mac.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 30 matching lines @@
     thread_pdf_docs = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 namespace printing {
 
 PdfMetafileCg::PdfMetafileCg()
     : page_is_open_(false),
       thread_pdf_docs_owned_(false) {
   if (!thread_pdf_docs.Pointer()->Get() &&
-      base::mac::IsOSSnowLeopardOrEarlier()) {
+      base::mac::IsOSSnowLeopard()) {
     thread_pdf_docs_owned_ = true;
     thread_pdf_docs.Pointer()->Set(
         CFSetCreateMutable(kCFAllocatorDefault, 0, &kCFTypeSetCallBacks));
   }
 }
 
 PdfMetafileCg::~PdfMetafileCg() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (pdf_doc_ && thread_pdf_docs.Pointer()->Get()) {
     // Transfer ownership to the pool.
@@ skipping 248 matching lines @@
 
   if (!pdf_doc_.get()) {
     ScopedCFTypeRef<CGDataProviderRef> pdf_data_provider(
         CGDataProviderCreateWithCFData(pdf_data_));
     pdf_doc_.reset(CGPDFDocumentCreateWithProvider(pdf_data_provider));
   }
   return pdf_doc_.get();
 }
 
 }  // namespace printing