PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

ppapi/thunk/thunk.h

 // 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.
 
 #ifndef PPAPI_THUNK_THUNK_H_
 #define PPAPI_THUNK_THUNK_H_
 
 #include "ppapi/c/private/ppb_instance_private.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
 
 // Declares a getter for the interface thunk of the form:
 //
 //   const PPB_Foo* ppapi::thunk::GetPPB_Foo_Thunk();
 //
 #define IFACE(interface_name, InterfaceType) \
   struct InterfaceType; \
   namespace ppapi { namespace thunk { \
   PPAPI_THUNK_EXPORT const InterfaceType* Get##InterfaceType##_Thunk(); \
   } }
 #define PROXIED_IFACE IFACE
 #define UNPROXIED_IFACE IFACE
 
 #include "ppapi/thunk/interfaces_ppb_private.h"
 #include "ppapi/thunk/interfaces_ppb_private_no_permissions.h"
 #include "ppapi/thunk/interfaces_ppb_private_flash.h"
 #include "ppapi/thunk/interfaces_ppb_public_stable.h"
 #include "ppapi/thunk/interfaces_ppb_public_dev.h"
+#include "ppapi/thunk/interfaces_ppb_public_dev_channel.h"
 
 #undef UNPROXIED_IFACE
 #undef PROXIED_IFACE
 #undef IFACE
 
 namespace ppapi {
 namespace thunk {
 
 // Old-style thunk getters. Only put trusted/private stuff here (it hasn't
 // yet been converted to the new system). Otherwise, add the declaration to
 // the appropriate interfaces_*.h file.
 PPAPI_THUNK_EXPORT const PPB_Instance_Private_0_1*
     GetPPB_Instance_Private_0_1_Thunk();
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_THUNK_H_