[Pepper] Wire up append mode writing support of FileIO

ppapi/shared_impl/file_growth.h

 // Copyright 2014 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_SHARED_IMPL_FILE_GROWTH_H_
 #define PPAPI_SHARED_IMPL_FILE_GROWTH_H_
 
 #include <map>
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/shared_impl/ppapi_shared_export.h"
 
 namespace ppapi {
 
 struct PPAPI_SHARED_EXPORT FileGrowth {
   FileGrowth();
   FileGrowth(int64_t max_written_offset, int64_t append_mode_write_amount);
 
   int64_t max_written_offset;
   int64_t append_mode_write_amount;
 };
 
 typedef std::map<int32_t, FileGrowth> FileGrowthMap;
 typedef std::map<int32_t, int64_t> FileSizeMap;
 
+PPAPI_SHARED_EXPORT FileGrowthMap FileSizeMapToFileGrowthMap(

[bbudge, 2014/01/27 21:53:37]

It might be a good idea to make it clear these are for testing:
e.g. FileSizeMapToFileGrowthMapForTesting

wdyt?

[tzik, 2014/01/28 06:12:49]

Sounds nice. Done.

+    const FileSizeMap& file_sizes);
+PPAPI_SHARED_EXPORT FileSizeMap FileGrowthMapToFileSizeMap(
+    const FileGrowthMap& file_growths);
+
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_FILE_GROWTH_H_