Record swap metrics

content/browser/memory/swap_metrics_observer_win.cc

Index: content/browser/memory/swap_metrics_observer_win.cc
diff --git a/content/browser/memory/swap_metrics_observer_win.cc b/content/browser/memory/swap_metrics_observer_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f80a5b5fa523bdba2ba05d829cf918534a5043e0
--- /dev/null
+++ b/content/browser/memory/swap_metrics_observer_win.cc
@@ -0,0 +1,16 @@
+// 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 "content/browser/memory/swap_metrics_observer.h"
+
+namespace content {
+
+// static
+SwapMetricsObserver* SwapMetricsObserver::GetInstance() {
+  // SwapMetricsObserver isn't available on Windows for now.
+  // TODO(bashi): Figure out a way to measure swap rates on Windows.
+  return nullptr;
+}
+
+}  // namespace content