Coverity: Initialize member variables.

ppapi/shared_impl/ppb_file_io_shared.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/shared_impl/ppb_file_io_shared.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/shared_impl/file_type_conversion.h"
 #include "ppapi/shared_impl/time_conversion.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_file_ref_api.h"
 
 namespace ppapi {
 
 using thunk::EnterResourceNoLock;
 using thunk::PPB_FileIO_API;
 using thunk::PPB_FileRef_API;
 
 PPB_FileIO_Shared::CallbackEntry::CallbackEntry()
     : read_buffer(NULL),
       info(NULL) {
+  callback.func = NULL;
+  callback.user_data = NULL;
 }
 
 PPB_FileIO_Shared::CallbackEntry::CallbackEntry(const CallbackEntry& entry)
     : callback(entry.callback),
       read_buffer(entry.read_buffer),
       info(entry.info) {
 }
 
 PPB_FileIO_Shared::CallbackEntry::~CallbackEntry() {
 }
@@ skipping 191 matching lines @@
 
   CallbackEntry front = callbacks_.front();
   callbacks_.pop_front();
   if (callbacks_.empty())
     pending_op_ = OPERATION_NONE;
 
   PP_RunCompletionCallback(&front.callback, result);
 }
 
 }  // namespace ppapi