Move DirectoryReader::ReadEntries to FileRef::ReadDirectoryEntries

ppapi/thunk/ppb_file_ref_api.h

Index: ppapi/thunk/ppb_file_ref_api.h
diff --git a/ppapi/thunk/ppb_file_ref_api.h b/ppapi/thunk/ppb_file_ref_api.h
index 4ec5314d122892113d4169d544016cf5d69143d5..ba92b63fcc44664ad8bc447283e424094f15efe0 100644
--- a/ppapi/thunk/ppb_file_ref_api.h
+++ b/ppapi/thunk/ppb_file_ref_api.h
@@ -5,6 +5,9 @@
 #ifndef PPAPI_THUNK_PPB_FILE_REF_API_H_
 #define PPAPI_THUNK_PPB_FILE_REF_API_H_
 
+#include <vector>
+
+#include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
@@ -34,6 +37,24 @@ class PPAPI_THUNK_EXPORT PPB_FileRef_API {
                          scoped_refptr<TrackedCallback> callback) = 0;
   virtual int32_t Query(PP_FileInfo* info,
                         scoped_refptr<TrackedCallback> callback) = 0;
+  virtual int32_t ReadDirectoryEntries(
+      const PP_ArrayOutput& output,
+      scoped_refptr<TrackedCallback> callback) = 0;
+  // We define variants of Query and ReadDirectoryEntries because
+  // 1. we need to take linked_ptr instead of raw pointers to avoid
+  // use-after-free, and 2. we don't use PP_ArrayOutput for the
+  // communication between renderers and the browser in
+  // ReadDirectoryEntries. The *InHost functions must not be called in
+  // plugins, and Query and ReadDirectoryEntries must not be called in
+  // renderers.
+  // TODO(hamaji): These functions must be removed when we move
+  // FileRef to the new resource design. http://crbug.com/225441
+  virtual int32_t QueryInHost(linked_ptr<PP_FileInfo> info,
+                              scoped_refptr<TrackedCallback> callback) = 0;
+  virtual int32_t ReadDirectoryEntriesInHost(
+      linked_ptr<std::vector<ppapi::PPB_FileRef_CreateInfo> > files,
+      linked_ptr<std::vector<PP_FileType> > file_types,
+      scoped_refptr<TrackedCallback> callback) = 0;
 
   // Internal function for use in proxying. Returns the internal CreateInfo
   // (the contained resource does not carry a ref on behalf of the caller).