Pepper: Add shared Utilities for file systems.

ppapi/proxy/file_io_resource.cc

 // 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.
 
 #include "ppapi/proxy/file_io_resource.h"
 
 #include "base/bind.h"
 #include "base/task_runner_util.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/array_writer.h"
+#include "ppapi/shared_impl/file_system_util.h"
 #include "ppapi/shared_impl/file_type_conversion.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_file_ref_api.h"
 
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_FileIO_API;
 using ppapi::thunk::PPB_FileRef_API;
@@ skipping 67 matching lines @@
 
 int32_t FileIOResource::Open(PP_Resource file_ref,
                              int32_t open_flags,
                              scoped_refptr<TrackedCallback> callback) {
   EnterResourceNoLock<PPB_FileRef_API> enter(file_ref, true);
   if (enter.failed())
     return PP_ERROR_BADRESOURCE;
 
   PPB_FileRef_API* file_ref_api = enter.object();
   PP_FileSystemType type = file_ref_api->GetFileSystemType();
-  if (type != PP_FILESYSTEMTYPE_LOCALPERSISTENT &&
-      type != PP_FILESYSTEMTYPE_LOCALTEMPORARY &&
-      type != PP_FILESYSTEMTYPE_EXTERNAL &&
-      type != PP_FILESYSTEMTYPE_ISOLATED) {
+  if (!FileSystemTypeIsValid(type)) {
     NOTREACHED();
     return PP_ERROR_FAILED;
   }
   file_system_type_ = type;
 
   int32_t rv = state_manager_.CheckOperationState(
       FileIOStateManager::OPERATION_EXCLUSIVE, false);
   if (rv != PP_OK)
     return rv;
 
@@ skipping 338 matching lines @@
   *output_handle = IPC::PlatformFileForTransitToPlatformFile(transit_file);
 
   // End this operation now, so the user's callback can execute another FileIO
   // operation, assuming there are no other pending operations.
   state_manager_.SetOperationFinished();
   callback->Run(result);
 }
 
 }  // namespace proxy
 }  // namespace ppapi