Add getter for lineMode and echoMode for Stdin.

runtime/bin/stdin_win.cc

Index: runtime/bin/stdin_win.cc
diff --git a/runtime/bin/stdin_win.cc b/runtime/bin/stdin_win.cc
index e1d036e58318b7f9408c6ab2e90a134827837611..44e517de7a87d4440c80cb63dd06f14c77968a02 100644
--- a/runtime/bin/stdin_win.cc
+++ b/runtime/bin/stdin_win.cc
@@ -23,6 +23,14 @@ int Stdin::ReadByte() {
 }
 
 
+bool Stdin::GetEchoMode() {
+  HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
+  DWORD mode;
+  if (!GetConsoleMode(h, &mode)) return false;
+  return (mode & ENABLE_ECHO_INPUT) != 0;
+}
+
+
 void Stdin::SetEchoMode(bool enabled) {
   HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
   DWORD mode;
@@ -36,6 +44,14 @@ void Stdin::SetEchoMode(bool enabled) {
 }
 
 
+bool Stdin::GetLineMode() {
+  HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
+  DWORD mode;
+  if (!GetConsoleMode(h, &mode)) return false;
+  return (mode & ENABLE_LINE_INPUT) != 0;
+}
+
+
 void Stdin::SetLineMode(bool enabled) {
   HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
   DWORD mode;