Revert of Remove obsolete V8_INFINITY macro.

src/conversions-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CONVERSIONS_INL_H_
 #define V8_CONVERSIONS_INL_H_
 
+#include <float.h>         // Required for DBL_MAX and on Win32 for finite()
+#include <limits.h>        // Required for INT_MAX etc.
+#include <stdarg.h>
 #include <cmath>
-#include <cstdarg>
-#include <limits>
+#include "src/globals.h"       // Required for V8_INFINITY
 
 // ----------------------------------------------------------------------------
 // Extra POSIX/ANSI functions for Win32/MSVC.
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/conversions.h"
 #include "src/double.h"
 #include "src/scanner.h"
 #include "src/strtod.h"
@@ skipping 453 matching lines @@
     if (!SubStringEquals(&current, end, kInfinityString)) {
       return JunkStringValue();
     }
 
     if (!allow_trailing_junk &&
         AdvanceToNonspace(unicode_cache, &current, end)) {
       return JunkStringValue();
     }
 
     DCHECK(buffer_pos == 0);
-    return (sign == NEGATIVE) ? -std::numeric_limits<double>::infinity()
-                              : std::numeric_limits<double>::infinity();
+    return (sign == NEGATIVE) ? -V8_INFINITY : V8_INFINITY;
   }
 
   bool leading_zero = false;
   if (*current == '0') {
     ++current;
     if (current == end) return SignedZero(sign == NEGATIVE);
 
     leading_zero = true;
 
     // It could be hexadecimal value.
@@ skipping 139 matching lines @@
     }
 
     if (current == end || *current < '0' || *current > '9') {
       if (allow_trailing_junk) {
         goto parsing_done;
       } else {
         return JunkStringValue();
       }
     }
 
-    const int max_exponent = std::numeric_limits<int>::max() / 2;
+    const int max_exponent = INT_MAX / 2;
     DCHECK(-max_exponent / 2 <= exponent && exponent <= max_exponent / 2);
     int num = 0;
     do {
       // Check overflow.
       int digit = *current - '0';
       if (num >= max_exponent / 10
           && !(num == max_exponent / 10 && digit <= max_exponent % 10)) {
         num = max_exponent;
       } else {
         num = num * 10 + digit;
@@ skipping 28 matching lines @@
   SLOW_DCHECK(buffer_pos < kBufferSize);
   buffer[buffer_pos] = '\0';
 
   double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return (sign == NEGATIVE) ? -converted : converted;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONVERSIONS_INL_H_