Revert "Remove support for MSVC"

sky/engine/public/platform/Platform.h

Index: sky/engine/public/platform/Platform.h
diff --git a/sky/engine/public/platform/Platform.h b/sky/engine/public/platform/Platform.h
index 90e427a2ac58264f2bfff403d23515e570e46c8a..ede4a519d7942563c12c6530f88ad50b723a8d57 100644
--- a/sky/engine/public/platform/Platform.h
+++ b/sky/engine/public/platform/Platform.h
@@ -31,6 +31,10 @@
 #ifndef Platform_h
 #define Platform_h
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 #include "WebCommon.h"
 #include "WebData.h"
 #include "WebGestureDevice.h"
@@ -76,7 +80,12 @@ struct WebSize;
 class Platform {
 public:
     // HTML5 Database ------------------------------------------------------
+
+#ifdef WIN32
+    typedef HANDLE FileHandle;
+#else
     typedef int FileHandle;
+#endif
 
     BLINK_PLATFORM_EXPORT static void initialize(Platform*);
     BLINK_PLATFORM_EXPORT static void shutdown();