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 b04c7e9e34fca470c01e2daecec3456045bc43ea..057fdef36ed4677b3711e35eb8baac22cb44213c 100644
--- a/ppapi/tests/test_file_io.cc
+++ b/ppapi/tests/test_file_io.cc
@@ -903,6 +903,31 @@ std::string TestFileIO::TestNotAllowMixedReadWrite() {
   if (rv_2 != PP_ERROR_INPROGRESS)
     return ReportError("FileIO::Read", rv_2);
 
+  // Cannot query while the write is pending.
+  TestCompletionCallback callback_3(instance_->pp_instance(), force_async_);
+  PP_FileInfo info;
+  int32_t rv_3 = file_io.Query(&info, callback_3);
+  if (rv_3 == PP_OK_COMPLETIONPENDING)
+    rv_3 = callback_3.WaitForResult();
+  if (rv_3 != PP_ERROR_INPROGRESS)
+    return ReportError("FileIO::Query", rv_3);
+
+  // Cannot touch while the write is pending.
+  TestCompletionCallback callback_4(instance_->pp_instance(), force_async_);
+  int32_t rv_4 = file_io.Touch(1234.0, 5678.0, callback_4);
+  if (rv_4 == PP_OK_COMPLETIONPENDING)
+    rv_4 = callback_4.WaitForResult();
+  if (rv_4 != PP_ERROR_INPROGRESS)
+    return ReportError("FileIO::Touch", rv_4);
+
+  // Cannot set length while the write is pending.
+  TestCompletionCallback callback_5(instance_->pp_instance(), force_async_);
+  int32_t rv_5 = file_io.SetLength(123, callback_5);
+  if (rv_5 == PP_OK_COMPLETIONPENDING)
+    rv_5 = callback_5.WaitForResult();
+  if (rv_5 != PP_ERROR_INPROGRESS)
+    return ReportError("FileIO::SetLength", rv_5);
+
   callback_1.WaitForResult();
 
   PASS();
@@ -940,10 +965,14 @@ 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(