Implement a proxy for Pepper FileIO.

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 79995ff083edaae91e48ccd150a7b90523039713..788212b7277c8dead2fbc3c157d68aac3b0680f8 100644
--- a/ppapi/tests/test_file_io.cc
+++ b/ppapi/tests/test_file_io.cc
@@ -941,10 +941,14 @@ std::string TestFileIO::TestWillWriteWillSetLength() {
   if (!trusted)
     return ReportError("FileIOTrusted", PP_ERROR_FAILED);
 
-  // Get file descriptor.
-  int32_t fd = trusted->GetOSFileDescriptor(file_io.pp_resource());
-  if (fd < 0)
-    return "FileIO::GetOSFileDescriptor() returned a bad file descriptor.";
+  // 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(