Add "PRIVATE" to the enum names of some private Pepper networking APIs:

ppapi/api/private/ppb_host_resolver_private.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.
  */
 
 /**
  * This file defines the <code>PPB_HostResolver_Private</code> interface.
  */
 
 label Chrome {
   M19 = 0.1
 };
 
 /**
  * The <code>PP_HostResolver_Flags</code> is an enumeration of the
  * different types of flags, that can be OR-ed and passed to host
  * resolver.
  */
 [assert_size(4)]
 enum PP_HostResolver_Private_Flags {
   /**
    * AI_CANONNAME
    */
-  PP_HOST_RESOLVER_FLAGS_CANONNAME = 1 << 0,
+  PP_HOST_RESOLVER_PRIVATE_FLAGS_CANONNAME = 1 << 0,
   /**
    * Hint to the resolver that only loopback addresses are configured.
    */
-  PP_HOST_RESOLVER_FLAGS_LOOPBACK_ONLY = 1 << 1
+  PP_HOST_RESOLVER_PRIVATE_FLAGS_LOOPBACK_ONLY = 1 << 1
 };
 
 [assert_size(8)]
 struct PP_HostResolver_Private_Hint {
   PP_NetAddressFamily_Private family;
   int32_t flags;
 };
 
 interface PPB_HostResolver_Private {
   /**
@@ skipping 31 matching lines @@
   /**
    * Stores in the |addr| |index|-th network address. |addr| can't be
    * NULL. Returns PP_TRUE if success or PP_FALSE if the given
    * resource is not a Host Resolver or |index| exceeds number of
    * available addresses.
   */
   PP_Bool GetNetAddress([in] PP_Resource host_resolver,
                         [in] uint32_t index,
                         [out] PP_NetAddress_Private addr);
 };