[Math] implement Math.random as TFJ builtin.

src/bootstrapper.cc

 // Copyright 2014 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.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1933 matching lines @@
     SimpleInstallFunction(math, "imul", Builtins::kMathImul, 2, true);
     SimpleInstallFunction(math, "log", Builtins::kMathLog, 1, true);
     SimpleInstallFunction(math, "log1p", Builtins::kMathLog1p, 1, true);
     SimpleInstallFunction(math, "log2", Builtins::kMathLog2, 1, true);
     SimpleInstallFunction(math, "log10", Builtins::kMathLog10, 1, true);
     SimpleInstallFunction(math, "max", Builtins::kMathMax, 2, false);
     SimpleInstallFunction(math, "min", Builtins::kMathMin, 2, false);
     Handle<JSFunction> math_pow =
         SimpleInstallFunction(math, "pow", Builtins::kMathPow, 2, true);
     native_context()->set_math_pow(*math_pow);
+    SimpleInstallFunction(math, "random", Builtins::kMathRandom, 0, true);
     SimpleInstallFunction(math, "round", Builtins::kMathRound, 1, true);
     SimpleInstallFunction(math, "sign", Builtins::kMathSign, 1, true);
     SimpleInstallFunction(math, "sin", Builtins::kMathSin, 1, true);
     SimpleInstallFunction(math, "sinh", Builtins::kMathSinh, 1, true);
     SimpleInstallFunction(math, "sqrt", Builtins::kMathSqrt, 1, true);
     SimpleInstallFunction(math, "tan", Builtins::kMathTan, 1, true);
     SimpleInstallFunction(math, "tanh", Builtins::kMathTanh, 1, true);
     SimpleInstallFunction(math, "trunc", Builtins::kMathTrunc, 1, true);
 
     // Install math constants.
@@ skipping 22 matching lines @@
         math, factory->NewStringFromAsciiChecked("PI"), factory->NewNumber(kPI),
         static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
     JSObject::AddProperty(
         math, factory->NewStringFromAsciiChecked("SQRT1_2"),
         factory->NewNumber(std::sqrt(0.5)),
         static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
     JSObject::AddProperty(
         math, factory->NewStringFromAsciiChecked("SQRT2"),
         factory->NewNumber(std::sqrt(2.0)),
         static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
+    JSObject::AddProperty(
+        math, factory->to_string_tag_symbol(),
+        factory->NewStringFromAsciiChecked("Math"),
+        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
   }
 
   {  // -- A r r a y B u f f e r
     Handle<JSFunction> array_buffer_fun = InstallArrayBuffer(
         global, "ArrayBuffer", Builtins::kArrayBufferPrototypeGetByteLength,
         BuiltinFunctionId::kArrayBufferByteLength);
     InstallWithIntrinsicDefaultProto(isolate, array_buffer_fun,
                                      Context::ARRAY_BUFFER_FUN_INDEX);
   }
 
@@ skipping 2376 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8