[WIP] Provided file system from NACL.

ppapi/thunk/ppb_filesystem_provider_api.h

Index: ppapi/thunk/ppb_filesystem_provider_api.h
diff --git a/ppapi/thunk/ppb_filesystem_provider_api.h b/ppapi/thunk/ppb_filesystem_provider_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..d481af0dafbeb01a3cf0ae1b0b7c0a3bda02fe88
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+++ b/ppapi/thunk/ppb_filesystem_provider_api.h
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+// Copyright 2015 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 PPB_FILESYSTEM_PROVIDER_API_H
+#define PPB_FILESYSTEM_PROVIDER_API_H
+
+#include "base/memory/ref_counted.h"
+#include "ppapi/c/dev/ppb_filesystemprovider_dev.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+namespace ppapi {
+class TrackedCallback;
+
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT PPB_FilesystemProvider_API {
+ public:
+  virtual ~PPB_FilesystemProvider_API() {}
+
+  virtual int32_t Mount(
+      struct PP_Var filesystem_id,
+      struct PP_Var display_name,
+      PP_Bool writable,
+      int32_t opened_files_limit,
+      PP_ProviderError_Dev* error,
+      scoped_refptr<TrackedCallback> callback)=0;
+
+  virtual int32_t Unmount(
+      struct PP_Var filesystem_id,
+      PP_ProviderError_Dev* error,
+      scoped_refptr<TrackedCallback> callback)=0;
+
+  virtual int32_t SendSuccessResponse(
+      PP_OperationType_Dev operation_type,
+      int32_t request_id)=0;
+  virtual int32_t SendErrorResponse(
+      PP_OperationType_Dev operation_type,
+      PP_ProviderError_Dev error,
+      int32_t request_id)=0;
+
+  virtual int32_t SendMetadataSuccessResponse(
+      const struct PP_EntryMetadata_Dev* metadata,
+      int32_t request_id)=0;
+
+  virtual int32_t SendReadDirectorySuccessResponse(
+      uint32_t array_size,
+      const struct PP_EntryMetadata_Dev entries[],
+      PP_Bool has_more,
+      int32_t request_id)=0;
+
+  virtual int32_t SendReadFileSuccessResponse(
+      uint32_t data_size,
+      const void* data,
+      PP_Bool has_more,
+      int32_t request_id)=0;
+  virtual int32_t GetNextRequest( PP_FilesystemRequest* request,
+                                  scoped_refptr<TrackedCallback> callback)=0;
+  virtual int32_t FreeWriteRequestBuffer(const void* buffer)=0;
+
+};
+
+} // thunk namespace
+} // ppapi namespace
+
+#endif // PPB_FILESYSTEM_PROVIDER_API_H
+