Drop the native FastNewBlockContextStub.

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 46 matching lines @@
   V(RecordWrite)                         \
   V(StoreBufferOverflow)                 \
   V(RegExpExec)                          \
   V(Instanceof)                          \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(StackCheck)                          \
   V(Interrupt)                           \
   V(FastNewClosure)                      \
   V(FastNewContext)                      \
-  V(FastNewBlockContext)                 \
   V(FastCloneShallowArray)               \
   V(FastCloneShallowObject)              \
   V(CreateAllocationSite)                \
   V(ToBoolean)                           \
   V(ToNumber)                            \
   V(ArgumentsAccess)                     \
   V(RegExpConstructResult)               \
   V(NumberToString)                      \
   V(DoubleToI)                           \
   V(CEntry)                              \
@@ skipping 501 matching lines @@
   virtual int NotMissMinorKey() V8_OVERRIDE { return slots_; }
 
   // Parameters accessed via CodeStubGraphBuilder::GetParameter()
   static const int kFunction = 0;
 
  private:
   int slots_;
 };
 
 
-class FastNewBlockContextStub : public PlatformCodeStub {
- public:
-  static const int kMaximumSlots = 64;
-
-  explicit FastNewBlockContextStub(int slots) : slots_(slots) {
-    ASSERT(slots_ > 0 && slots_ <= kMaximumSlots);
-  }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  int slots_;
-
-  Major MajorKey() { return FastNewBlockContext; }
-  int MinorKey() { return slots_; }
-};
-
 class FastCloneShallowArrayStub : public HydrogenCodeStub {
  public:
   // Maximum length of copied elements array.
   static const int kMaximumClonedLength = 8;
   enum Mode {
     CLONE_ELEMENTS,
     CLONE_DOUBLE_ELEMENTS,
     COPY_ON_WRITE_ELEMENTS,
     CLONE_ANY_ELEMENTS,
     LAST_CLONE_MODE = CLONE_ANY_ELEMENTS
@@ skipping 1910 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_