Moves LowMemoryObserver into chromeos and renames

chromeos/memory/low_memory_listener_delegate.h

Index: chromeos/memory/low_memory_listener_delegate.h
diff --git a/chromeos/memory/low_memory_listener_delegate.h b/chromeos/memory/low_memory_listener_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..d3a13bbb518d6418756473ebfba039203b817fd3
--- /dev/null
+++ b/chromeos/memory/low_memory_listener_delegate.h
@@ -0,0 +1,23 @@
+// Copyright (c) 2013 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.
+
+#ifndef CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_DELEGATE_H_
+#define CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_DELEGATE_H_
+
+#include "chromeos/memory/chromeos_memory_export.h"
+
+namespace chromeos {
+
+class CHROMEOS_MEMORY_EXPORT LowMemoryListenerDelegate {
+ public:
+  // Invoked when a low memory situation is detected.
+  virtual void OnMemoryLow() = 0;
+
+ protected:
+  virtual ~LowMemoryListenerDelegate() {}
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_DELEGATE_H_