[Math] implement Math.random as TFJ builtin.

src/builtins/builtins.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_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 432 matching lines @@
   /* ES6 section 20.2.2.22 Math.log10 ( x ) */                                \
   TFJ(MathLog10, 2)                                                           \
   /* ES6 section 20.2.2.23 Math.log2 ( x ) */                                 \
   TFJ(MathLog2, 2)                                                            \
   /* ES6 section 20.2.2.24 Math.max ( value1, value2 , ...values ) */         \
   ASM(MathMax)                                                                \
   /* ES6 section 20.2.2.25 Math.min ( value1, value2 , ...values ) */         \
   ASM(MathMin)                                                                \
   /* ES6 section 20.2.2.26 Math.pow ( x, y ) */                               \
   TFJ(MathPow, 3)                                                             \
+  /* ES6 section 20.2.2.27 Math.random */                                     \
+  TFJ(MathRandom, 1)                                                          \
   /* ES6 section 20.2.2.28 Math.round ( x ) */                                \
   TFJ(MathRound, 2)                                                           \
   /* ES6 section 20.2.2.29 Math.sign ( x ) */                                 \
   TFJ(MathSign, 2)                                                            \
   /* ES6 section 20.2.2.30 Math.sin ( x ) */                                  \
   TFJ(MathSin, 2)                                                             \
   /* ES6 section 20.2.2.31 Math.sinh ( x ) */                                 \
   TFJ(MathSinh, 2)                                                            \
   /* ES6 section 20.2.2.32 Math.sqrt ( x ) */                                 \
   TFJ(MathTan, 2)                                                             \
@@ skipping 336 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_