Extract PepperFileSystemTypeToFileSystemType() from ppapi.

ppapi/shared_impl/file_system_util.cc

Index: ppapi/shared_impl/file_system_util.cc
diff --git a/ppapi/shared_impl/file_system_util.cc b/ppapi/shared_impl/file_system_util.cc
index 330995cceb8d57c7807e013481e05767ed0828b7..25650d1c853916a0f64b7d3b0718140b2693539a 100644
--- a/ppapi/shared_impl/file_system_util.cc
+++ b/ppapi/shared_impl/file_system_util.cc
@@ -8,20 +8,6 @@
 
 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 ||