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

src/hydrogen.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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2162 matching lines @@
   F(IsArray)                           \
   F(IsTypedArray)                      \
   F(IsRegExp)                          \
   F(IsJSProxy)                         \
   F(IsConstructCall)                   \
   F(CallFunction)                      \
   F(ArgumentsLength)                   \
   F(Arguments)                         \
   F(ValueOf)                           \
   F(SetValueOf)                        \
-  F(ThrowIfNotADate)                   \
+  F(IsDate)                            \
   F(DateField)                         \
+  F(ThrowNotDateError)                 \
   F(StringCharFromCode)                \
   F(StringCharAt)                      \
   F(OneByteSeqStringSetChar)           \
   F(TwoByteSeqStringSetChar)           \
   F(ObjectEquals)                      \
   F(IsObject)                          \
   F(IsFunction)                        \
   F(IsUndetectableObject)              \
   F(IsSpecObject)                      \
   F(MathPow)                           \
@@ skipping 852 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_