MIPS: Turn the NumberToStringStub into a hydrogen stub.

src/mips/code-stubs-mips.h

Index: src/mips/code-stubs-mips.h
diff --git a/src/mips/code-stubs-mips.h b/src/mips/code-stubs-mips.h
index 627244c2f13570b6a080164e8de74afecc49b558..91a18d9058ac5d59c630dbe4674d9f53dba83e57 100644
--- a/src/mips/code-stubs-mips.h
+++ b/src/mips/code-stubs-mips.h
@@ -268,18 +268,6 @@ class WriteInt32ToHeapNumberStub : public PlatformCodeStub {
 };
 
 
-class NumberToStringStub: public PlatformCodeStub {
- public:
-  NumberToStringStub() { }
-
- private:
-  Major MajorKey() { return NumberToString; }
-  int MinorKey() { return 0; }
-
-  void Generate(MacroAssembler* masm);
-};
-
-
 class RecordWriteStub: public PlatformCodeStub {
  public:
   RecordWriteStub(Register object,