Migrating PPB_FileIO_Dev, PPB_FileRef_Dev, and PPB_FileSystem_Dev dependencies to PPB_FileIO, PPB...

ppapi/cpp/dev/directory_reader_dev.h

Index: ppapi/cpp/dev/directory_reader_dev.h
===================================================================
--- ppapi/cpp/dev/directory_reader_dev.h	(revision 91228)
+++ ppapi/cpp/dev/directory_reader_dev.h	(working copy)
@@ -14,12 +14,12 @@
 
 class CompletionCallback;
 class DirectoryEntry_Dev;
-class FileRef_Dev;
+class FileRef;
 
 class DirectoryReader_Dev : public Resource {
  public:
   // Creates a DirectoryReader for the given directory.
-  DirectoryReader_Dev(const FileRef_Dev& directory_ref);
+  explicit DirectoryReader_Dev(const FileRef& directory_ref);
 
   DirectoryReader_Dev(const DirectoryReader_Dev& other);