Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/system_info_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.
 
-// File-level comment to appease parser. Eventually this will not be necessary.
+// Use the <code>systemInfo.cpu</code> API to query CPU metadata.
 namespace systemInfo.cpu {
 
   dictionary CpuInfo {
     // The number of logical processors.
     long numOfProcessors;
     // The architecture name of the processors.
     DOMString archName;
     // The model name of the processors.
     DOMString modelName;
   };
 
   callback CpuInfoCallback = void (CpuInfo info);
-  
+
   interface Functions {
     // Queries basic CPU information of the system.
     static void get(CpuInfoCallback callback);
   };
 };