Add getter for hasTerminal, terminalColumns and terminalLines on stdout.

runtime/bin/stdio.cc

Index: runtime/bin/stdio.cc
diff --git a/runtime/bin/stdin.cc b/runtime/bin/stdio.cc
similarity index 75%
rename from runtime/bin/stdin.cc
rename to runtime/bin/stdio.cc
index ef7904af9a6cb3cd73849f12741ca7b9159560fa..916a3b8208f18fe434a43c6b02199c9f4c7588c6 100644
--- a/runtime/bin/stdin.cc
+++ b/runtime/bin/stdio.cc
@@ -5,7 +5,7 @@
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/utils.h"
-#include "bin/stdin.h"
+#include "bin/stdio.h"
 
 #include "platform/globals.h"
 #include "platform/thread.h"
@@ -43,5 +43,18 @@ void FUNCTION_NAME(Stdin_SetLineMode)(Dart_NativeArguments args) {
   Stdin::SetLineMode(enabled);
 }
 
+
+void FUNCTION_NAME(Stdout_GetTerminalSize)(Dart_NativeArguments args) {
+  int size[2];
+  if (Stdout::GetTerminalSize(size)) {
+    Dart_Handle list = Dart_NewList(2);
+    Dart_ListSetAt(list, 0, Dart_NewInteger(size[0]));
+    Dart_ListSetAt(list, 1, Dart_NewInteger(size[1]));
+    Dart_SetReturnValue(args, list);
+  } else {
+    Dart_SetReturnValue(args, DartUtils::NewDartOSError());
+  }
+}
+
 }  // namespace bin
 }  // namespace dart