[builtins] Migrate Number.parseFloat to a TurboFan 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 462 matching lines @@
   /* ES6 section 20.1.1.1 Number ( [ value ] ) for the [[Construct]] case */  \
   ASM(NumberConstructor_ConstructStub)                                        \
   /* ES6 section 20.1.2.2 Number.isFinite ( number ) */                       \
   TFJ(NumberIsFinite, 2)                                                      \
   /* ES6 section 20.1.2.3 Number.isInteger ( number ) */                      \
   TFJ(NumberIsInteger, 2)                                                     \
   /* ES6 section 20.1.2.4 Number.isNaN ( number ) */                          \
   TFJ(NumberIsNaN, 2)                                                         \
   /* ES6 section 20.1.2.5 Number.isSafeInteger ( number ) */                  \
   TFJ(NumberIsSafeInteger, 2)                                                 \
+  /* ES6 section 20.1.2.12 Number.parseFloat ( string ) */                    \
+  TFJ(NumberParseFloat, 2)                                                    \
   CPP(NumberPrototypeToExponential)                                           \
   CPP(NumberPrototypeToFixed)                                                 \
   CPP(NumberPrototypeToLocaleString)                                          \
   CPP(NumberPrototypeToPrecision)                                             \
   CPP(NumberPrototypeToString)                                                \
   /* ES6 section 20.1.3.7 Number.prototype.valueOf ( ) */                     \
   TFJ(NumberPrototypeValueOf, 1)                                              \
   TFS(Add, BUILTIN, kNoExtraICState, BinaryOp)                                \
   TFS(Subtract, BUILTIN, kNoExtraICState, BinaryOp)                           \
   TFS(Multiply, BUILTIN, kNoExtraICState, BinaryOp)                           \
@@ skipping 293 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_