Revert "Remove support for MSVC"

sky/engine/wtf/dtoa/utils.h

Index: sky/engine/wtf/dtoa/utils.h
diff --git a/sky/engine/wtf/dtoa/utils.h b/sky/engine/wtf/dtoa/utils.h
index ac7b85cc7b2420b9237bf992fd70dde742adb136..54bbfb30fb486e2be9d61f620f67c46a866cd68d 100644
--- a/sky/engine/wtf/dtoa/utils.h
+++ b/sky/engine/wtf/dtoa/utils.h
@@ -49,13 +49,35 @@ defined(__ARMEL__) || defined(__aarch64__) || \
 defined(__MIPSEL__)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(_M_IX86) || defined(__i386__)
+#if defined(_WIN32)
+// Windows uses a 64bit wide floating point stack.
+#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
+#else
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
+#endif  // _WIN32
 #else
 #error Target architecture was not detected as supported by Double-Conversion.
 #endif
 
+
+#if defined(_WIN32) && !defined(__MINGW32__)
+
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef short int16_t;  // NOLINT
+typedef unsigned short uint16_t;  // NOLINT
+typedef int int32_t;
+typedef unsigned int uint32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+// intptr_t and friends are defined in crtdefs.h through stdio.h.
+
+#else
+
 #include <stdint.h>
 
+#endif
+
 // The following macro works on both 32 and 64-bit platforms.
 // Usage: instead of writing 0x1234567890123456
 //      write UINT64_2PART_C(0x12345678,90123456);