Replace base::SharedMemory read-only methods with GetReadOnlyHandle.

base/memory/shared_memory_helper.cc

 // 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.
 
 #include "base/memory/shared_memory_helper.h"
 
 #include "base/threading/thread_restrictions.h"
 
 namespace base {
 
@@ skipping 30 matching lines @@
 
   if (!*fp)
     return false;
 
   // Deleting the file prevents anyone else from mapping it in (making it
   // private), and prevents the need for cleanup (once the last fd is
   // closed, it is truly freed).
   path_unlinker.reset(path);
 
   if (options.share_read_only) {
-    // Also open as readonly so that we can ShareReadOnlyToProcess.
+    // Also open as readonly so that we can GetReadOnlyHandle.
     readonly_fd->reset(HANDLE_EINTR(open(path->value().c_str(), O_RDONLY)));
     if (!readonly_fd->is_valid()) {
       DPLOG(ERROR) << "open(\"" << path->value() << "\", O_RDONLY) failed";
       fp->reset();
       return false;
     }
   }
   return true;
 }
 
@@ skipping 27 matching lines @@
   if (*mapped_file == -1) {
     NOTREACHED() << "Call to dup failed, errno=" << errno;
   }
   *readonly_mapped_file = readonly_fd.release();
 
   return true;
 }
 #endif  // !defined(OS_ANDROID)
 
 }  // namespace base