Merge V8 at r10446: Roll to 3.6.6.19

Bug: 5688872
Change-Id: Ie6be41e043db4e38abeb6b8d92761d7cc2c294bf
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index ce19a4e..c968ffc 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -266,6 +266,7 @@
                               Register scratch,
                               Label* miss);
 
+  void GetNumberHash(Register reg0, Register scratch);
 
   void LoadFromNumberDictionary(Label* miss,
                                 Register elements,