Revert "Remove support for MSVC"

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

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 42 matching lines @@
     while (*expectedCharacters)
         source.advanceAndASSERTIgnoringCase(*expectedCharacters++);
 }
 
 inline void advanceStringAndASSERT(SegmentedString& source, const char* expectedCharacters)
 {
     while (*expectedCharacters)
         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;
 
 // We use this macro when the HTML5 spec says "reconsume the current input
 // character in the <mumble> state."
 #define RECONSUME_IN(prefix, stateName)                                    \
     do {                                                                   \
         m_state = prefix::stateName;                                       \
         goto stateName;                                                    \
     } while (false)
@@ skipping 18 matching lines @@
         m_state = prefix::stateName;                                       \
         if (source.isEmpty() || !m_inputStreamPreprocessor.peek(source))   \
             return haveBufferedCharacterToken();                           \
         cc = m_inputStreamPreprocessor.nextInputCharacter();               \
         goto stateName;                                                    \
     } while (false)
 
 }
 
 #endif // MarkupTokenizerInlines_h