Remove reference to base/memory/ref_counted.cc from GN bootstrap.

R=brettw@chromium.org, phajdan.jr@chromium.org

Review-Url: https://codereview.chromium.org/2361693002
Cr-Original-Commit-Position: refs/heads/master@{#420510}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 27933010d920c22d7e536d100099223152b3c7c6
diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index b07fd0a..e830454 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -397,7 +397,6 @@
       'base/location.cc',
       'base/logging.cc',
       'base/md5.cc',
-      'base/memory/ref_counted.cc',
       'base/memory/ref_counted_memory.cc',
       'base/memory/singleton.cc',
       'base/memory/weak_ptr.cc',