Revert "Remove support for MSVC"

sky/engine/core/html/parser/MarkupTokenizerInlines.h

Index: sky/engine/core/html/parser/MarkupTokenizerInlines.h
diff --git a/sky/engine/core/html/parser/MarkupTokenizerInlines.h b/sky/engine/core/html/parser/MarkupTokenizerInlines.h
index 9b34243738b8da572deb21d4c5ede53966bca8ec..13747c611ffe3eddac916c354b25c309c19463ad 100644
--- a/sky/engine/core/html/parser/MarkupTokenizerInlines.h
+++ b/sky/engine/core/html/parser/MarkupTokenizerInlines.h
@@ -60,6 +60,12 @@ inline void advanceStringAndASSERT(SegmentedString& source, const char* expected
         source.advanceAndASSERT(*expectedCharacters++);
 }
 
+#if COMPILER(MSVC)
+// We need to disable the "unreachable code" warning because we want to assert
+// that some code points aren't reached in the state machine.
+#pragma warning(disable: 4702)
+#endif
+
 #define BEGIN_STATE(prefix, stateName) case prefix::stateName: stateName:
 #define END_STATE() ASSERT_NOT_REACHED(); break;