Replace SharedMemory::UniqueID usages with SharedMemoryHandle's guid

base/memory/shared_memory.cc

Index: base/memory/shared_memory.cc
diff --git a/base/memory/shared_memory.cc b/base/memory/shared_memory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c945e930386148d0ee80b076a2660990d4a5ae4
--- /dev/null
+++ b/base/memory/shared_memory.cc
@@ -0,0 +1,13 @@
+// Copyright 2017 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.h"
+
+namespace base {
+
+base::UnguessableToken SharedMemory::GetGUID() const {
+  return handle().GetGUID();
+}
+
+}  // namespace base