Pepper: Ensure FileIO host cleans up before FileSystem host destructs.

content/browser/renderer_host/pepper/pepper_file_io_host.cc

 // 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.
 
 #include "content/browser/renderer_host/pepper/pepper_file_io_host.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/files/file_util_proxy.h"
@@ skipping 387 matching lines @@
                      weak_factory_.GetWeakPtr(),
                      context->MakeReplyMessageContext())))
     return PP_ERROR_FAILED;
 
   state_manager_.SetPendingOperation(FileIOStateManager::OPERATION_EXCLUSIVE);
   return PP_OK_COMPLETIONPENDING;
 }
 
 int32_t PepperFileIOHost::OnHostMsgClose(
     ppapi::host::HostMessageContext* context) {
-  if (check_quota_)
+  if (check_quota_) {
     file_system_host_->CloseQuotaFile(this);
+    check_quota_ = false;

[bbudge, 2013/12/27 20:04:28]

This ensures we don't do this twice.

+  }
 
   if (file_ != base::kInvalidPlatformFileValue) {
     base::FileUtilProxy::Close(
         file_message_loop_,
         file_,
         base::Bind(&PepperFileIOHost::DidCloseFile,
                    weak_factory_.GetWeakPtr()));
     file_ = base::kInvalidPlatformFileValue;
   }
   return PP_OK;
@@ skipping 180 matching lines @@
       file_, plugin_process_id, false);
   if (transit_file == IPC::InvalidPlatformFileForTransit())
     return false;
   ppapi::proxy::SerializedHandle file_handle;
   file_handle.set_file_handle(transit_file, open_flags, 0 /* file_io */);
   reply_context->params.AppendHandle(file_handle);
   return true;
 }
 
 }  // namespace content