Move system.* family of APIs to extensions/

extensions/common/api/system_cpu.idl

 // Copyright 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.
 
 // Use the <code>system.cpu</code> API to query CPU metadata.
 namespace system.cpu {
 
   // Counters for assessing CPU utilization.  Each field is monotonically
   // increasing while the processor is powered on.  Values are in milliseconds.
   dictionary CpuTime {
@@ skipping 35 matching lines @@
     ProcessorInfo[] processors;
   };
 
   callback CpuInfoCallback = void (CpuInfo info);
 
   interface Functions {
     // Queries basic CPU information of the system.
     static void getInfo(CpuInfoCallback callback);
   };
 };