PPAPI: Add PluginPrivateFileSystem

ppapi/shared_impl/file_system_util.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 "ppapi/shared_impl/file_system_util.h"
 
+#include "base/logging.h"
+
 namespace ppapi {
 
 fileapi::FileSystemType PepperFileSystemTypeToFileSystemType(
     PP_FileSystemType type) {
   switch (type) {
     case PP_FILESYSTEMTYPE_LOCALTEMPORARY:
       return fileapi::kFileSystemTypeTemporary;
     case PP_FILESYSTEMTYPE_LOCALPERSISTENT:
       return fileapi::kFileSystemTypePersistent;
     case PP_FILESYSTEMTYPE_EXTERNAL:
       return fileapi::kFileSystemTypeExternal;
     default:
       return fileapi::kFileSystemTypeUnknown;
   }
 }
 
 bool FileSystemTypeIsValid(PP_FileSystemType type) {
   return (type == PP_FILESYSTEMTYPE_LOCALPERSISTENT ||
           type == PP_FILESYSTEMTYPE_LOCALTEMPORARY ||
           type == PP_FILESYSTEMTYPE_EXTERNAL ||
           type == PP_FILESYSTEMTYPE_ISOLATED);
 }
 
 bool FileSystemTypeHasQuota(PP_FileSystemType type) {
   return (type == PP_FILESYSTEMTYPE_LOCALTEMPORARY ||
           type == PP_FILESYSTEMTYPE_LOCALPERSISTENT);
 }
 
+std::string IsolatedFileSystemTypeToRootName(
+    PP_IsolatedFileSystemType_Private type) {
+  switch (type) {
+    case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_CRX:
+      return "crxfs";
+    case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE:
+      return "pluginprivate";
+    default:
+      NOTREACHED() << type;
+      return std::string();
+  }
+}
+
 }  // namespace ppapi