Fixes for compilation of Blink on VS2013

Source/wtf/dtoa.cpp

 /****************************************************************
  *
  * The author of this software is David M. Gay.
  *
  * Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
  * Copyright (C) 2002, 2005, 2006, 2007, 2008, 2010, 2012 Apple Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose without fee is hereby granted, provided that this entire notice
  * is included in all copies of any software which is or includes a copy
@@ skipping 26 matching lines @@
 
 #include "wtf/CPU.h"
 #include "wtf/MathExtras.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/Vector.h"
 
 #if COMPILER(MSVC)
 #pragma warning(disable: 4244)
 #pragma warning(disable: 4245)
 #pragma warning(disable: 4554)
+
+#if _MSC_VER == 1800
+// TODO(scottmg): VS2013 currently ICEs on a bunch of functions in this file.
+// Upstream bug fixed in next release. See http://crbug.com/288498.
+#pragma optimize("", off)
+#endif
+
 #endif
 
 namespace WTF {
 
 Mutex* s_dtoaP5Mutex;
 
 typedef union {
     double d;
     uint32_t L[2];
 } U;
@@ skipping 1247 matching lines @@
 {
     Vector<LChar> conversionBuffer(length);
     for (size_t i = 0; i < length; ++i)
         conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
     return parseDouble(conversionBuffer.data(), length, parsedLength);
 }
 
 } // namespace Internal
 
 } // namespace WTF