Refactor FileIO to the new design

ppapi/tests/test_file_io.cc

Index: ppapi/tests/test_file_io.cc
diff --git a/ppapi/tests/test_file_io.cc b/ppapi/tests/test_file_io.cc
index 9f88f00b85354841117a1ef8b2cb533df2eaf3ac..83a092c44c2872ced87fe7536cf7bf371e3f8f81 100644
--- a/ppapi/tests/test_file_io.cc
+++ b/ppapi/tests/test_file_io.cc
@@ -1141,15 +1141,6 @@ std::string TestFileIO::TestWillWriteWillSetLength() {
   if (!trusted)
     return ReportError("FileIOTrusted", PP_ERROR_FAILED);
 
-  // Get file descriptor. This is only supported in-process for now, so don't
-  // test out of process.
-  const PPB_Testing_Dev* testing_interface = GetTestingInterface();
-  if (testing_interface && !testing_interface->IsOutOfProcess()) {
-    int32_t fd = trusted->GetOSFileDescriptor(file_io.pp_resource());
-    if (fd < 0)
-      return "FileIO::GetOSFileDescriptor() returned a bad file descriptor.";
-  }
-
   // Calling WillWrite.
   rv = trusted->WillWrite(
       file_io.pp_resource(), 0, 9,