Import chrome idl into third_party

third_party/chrome/idl/experimental_system_info_memory.idl

+// 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.
+
+// File-level comment to appease parser. Eventually this will not be necessary.
+namespace experimental.systemInfo.memory {
+
+  dictionary MemoryInfo {
+    // The total amount of physical memory capacity, in bytes.
+    double capacity;
+    // The amount of available capacity, in bytes.
+    double availableCapacity;
+  };
+
+  callback MemoryInfoCallback = void (MemoryInfo info);
+  
+  interface Functions {
+    // Get physical memory information.
+    static void get(MemoryInfoCallback callback);
+  };
+};