Extract scanner base/JS/JSON and move base and JS to scanner-base.

src/conversions.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 57 matching lines @@
 // This function should match the exact semantics of ECMA-262 9.5.
 static inline int32_t DoubleToInt32(double x);
 
 
 // This function should match the exact semantics of ECMA-262 9.6.
 static inline uint32_t DoubleToUint32(double x) {
   return static_cast<uint32_t>(DoubleToInt32(x));
 }
 
 
-// Returns the value (0 .. 15) of a hexadecimal character c.
-// If c is not a legal hexadecimal character, returns a value < 0.
-int HexValue(uc32 c);
-
-
 // Enumeration for allowing octals and ignoring junk when converting
 // strings to numbers.
 enum ConversionFlags {
   NO_FLAGS = 0,
   ALLOW_HEX = 1,
   ALLOW_OCTALS = 2,
   ALLOW_TRAILING_JUNK = 4
 };
 
 
@@ skipping 25 matching lines @@
 // Additional number to string conversions for the number type.
 // The caller is responsible for calling free on the returned pointer.
 char* DoubleToFixedCString(double value, int f);
 char* DoubleToExponentialCString(double value, int f);
 char* DoubleToPrecisionCString(double value, int f);
 char* DoubleToRadixCString(double value, int radix);
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONVERSIONS_H_