Fix a bunch of IWYU violators that don't include scoped_ptr.h

content/common/font_config_ipc_linux.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 "content/common/font_config_ipc_linux.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdint.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
 #include <functional>
 
 #include "base/files/file_util.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/pickle.h"
 #include "base/posix/unix_domain_socket_linux.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/trace_event/trace_event.h"
 #include "skia/ext/refptr.h"
 #include "skia/ext/skia_utils_base.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkStream.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 
@@ skipping 137 matching lines @@
   if (!typeface_stream)
     return nullptr;
   skia::RefPtr<SkTypeface> typeface_from_stream = skia::AdoptRef(
       SkTypeface::CreateFromStream(typeface_stream, identity.fTTCIndex));
   auto mapped_typefaces_insert_it =
       mapped_typefaces_.Put(identity, typeface_from_stream);
   return SkSafeRef(mapped_typefaces_insert_it->second.get());
 }
 
 }  // namespace content