[date] Use explicit control flow to replace %_ThrowIfNotADate.

src/full-codegen.h

 // Copyright 2012 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_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 513 matching lines @@
   F(IsTypedArray)                         \
   F(IsRegExp)                             \
   F(IsJSProxy)                            \
   F(IsConstructCall)                      \
   F(CallFunction)                         \
   F(DefaultConstructorCallSuper)          \
   F(ArgumentsLength)                      \
   F(Arguments)                            \
   F(ValueOf)                              \
   F(SetValueOf)                           \
-  F(ThrowIfNotADate)                      \
+  F(IsDate)                               \
   F(DateField)                            \
   F(StringCharFromCode)                   \
   F(StringCharAt)                         \
   F(OneByteSeqStringSetChar)              \
   F(TwoByteSeqStringSetChar)              \
   F(ObjectEquals)                         \
   F(IsObject)                             \
   F(IsFunction)                           \
   F(IsUndetectableObject)                 \
   F(IsSpecObject)                         \
@@ skipping 551 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_