Reapply revert of "Make stdout/stderr async"

runtime/bin/stdio_win.cc

Index: runtime/bin/stdio_win.cc
diff --git a/runtime/bin/stdio_win.cc b/runtime/bin/stdio_win.cc
index 24ceb325cab4ca19dbbeea10c791d32d4c4bc69a..ec479c08719367e8c543ed6dc9e5296e0857d052 100644
--- a/runtime/bin/stdio_win.cc
+++ b/runtime/bin/stdio_win.cc
@@ -65,8 +65,13 @@ void Stdin::SetLineMode(bool enabled) {
 }
 
 
-bool Stdout::GetTerminalSize(int size[2]) {
-  HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
+bool Stdout::GetTerminalSize(intptr_t fd, int size[2]) {
+  HANDLE h;
+  if (fd == 1) {
+    h = GetStdHandle(STD_OUTPUT_HANDLE);
+  } else {
+    h = GetStdHandle(STD_ERROR_HANDLE);
+  }
   CONSOLE_SCREEN_BUFFER_INFO info;
   if (!GetConsoleScreenBufferInfo(h, &info)) return false;
   size[0] = info.srWindow.Right - info.srWindow.Left + 1;