Spelling fixes e to i.

runtime/bin/platform_win.cc

Index: runtime/bin/platform_win.cc
diff --git a/runtime/bin/platform_win.cc b/runtime/bin/platform_win.cc
index a15f437391174e0838f4595f80705c8920b9c21a..b0e8eabb1e78c9126fe2bcca2f76107c7c18a0f3 100644
--- a/runtime/bin/platform_win.cc
+++ b/runtime/bin/platform_win.cc
@@ -59,7 +59,7 @@ class PlatformWin {
     // See: https://msdn.microsoft.com/en-us/library/windows/desktop/ms680621(v=vs.85).aspx
     SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
     // Set up a signal handler that restores the console state on a
-    // CTRL_C_EVENT signal. This will only run when there is no signal hanlder
+    // CTRL_C_EVENT signal. This will only run when there is no signal handler
     // registered for the CTRL_C_EVENT from Dart code.
     SetConsoleCtrlHandler(SignalHandler, TRUE);
   }