Removed dead WriteInt32ToHeapNumberStub.

src/mips64/code-stubs-mips64.h

Index: src/mips64/code-stubs-mips64.h
diff --git a/src/mips64/code-stubs-mips64.h b/src/mips64/code-stubs-mips64.h
index 6c324bb85c7766d03902217a5f23c354c3b8ea5c..3cd6ed6a2d8278f582b1f1abf8c34bae0fcc50ea 100644
--- a/src/mips64/code-stubs-mips64.h
+++ b/src/mips64/code-stubs-mips64.h
@@ -73,56 +73,6 @@ class RestoreRegistersStateStub: public PlatformCodeStub {
   DEFINE_PLATFORM_CODE_STUB(RestoreRegistersState, PlatformCodeStub);
 };
 
-// This stub can convert a signed int32 to a heap number (double).  It does
-// not work for int32s that are in Smi range!  No GC occurs during this stub
-// so you don't have to set up the frame.
-class WriteInt32ToHeapNumberStub : public PlatformCodeStub {
- public:
-  WriteInt32ToHeapNumberStub(Isolate* isolate, Register the_int,
-                             Register the_heap_number, Register scratch,
-                             Register scratch2)
-      : PlatformCodeStub(isolate) {
-    minor_key_ = IntRegisterBits::encode(the_int.code()) |
-                 HeapNumberRegisterBits::encode(the_heap_number.code()) |
-                 ScratchRegisterBits::encode(scratch.code()) |
-                 SignRegisterBits::encode(scratch2.code());
-    DCHECK(IntRegisterBits::is_valid(the_int.code()));
-    DCHECK(HeapNumberRegisterBits::is_valid(the_heap_number.code()));
-    DCHECK(ScratchRegisterBits::is_valid(scratch.code()));
-    DCHECK(SignRegisterBits::is_valid(scratch2.code()));
-  }
-
-  static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
-
- private:
-  void Generate(MacroAssembler* masm);
-
-  Register the_int() const {
-    return Register::from_code(IntRegisterBits::decode(minor_key_));
-  }
-
-  Register the_heap_number() const {
-    return Register::from_code(HeapNumberRegisterBits::decode(minor_key_));
-  }
-
-  Register scratch() const {
-    return Register::from_code(ScratchRegisterBits::decode(minor_key_));
-  }
-
-  Register sign() const {
-    return Register::from_code(SignRegisterBits::decode(minor_key_));
-  }
-
-  // Minor key encoding in 16 bits.
-  class IntRegisterBits: public BitField<int, 0, 4> {};
-  class HeapNumberRegisterBits: public BitField<int, 4, 4> {};
-  class ScratchRegisterBits: public BitField<int, 8, 4> {};
-  class SignRegisterBits: public BitField<int, 12, 4> {};
-
-  DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
-  DEFINE_CODE_STUB(WriteInt32ToHeapNumber, PlatformCodeStub);
-};
-
 
 class RecordWriteStub: public PlatformCodeStub {
  public: