Merge WebKit at r59636: Update v8 to r4660.

Will build and run with current webkit.

Change-Id: I57bae621fd894da363ba84e1757ad09eb7c502b9
diff --git a/src/arm/simulator-arm.h b/src/arm/simulator-arm.h
index 91614ea..61af3aa 100644
--- a/src/arm/simulator-arm.h
+++ b/src/arm/simulator-arm.h
@@ -159,6 +159,7 @@
   // instruction.
   void set_register(int reg, int32_t value);
   int32_t get_register(int reg) const;
+  void set_dw_register(int dreg, const int* dbl);
 
   // Support for VFP.
   void set_s_register(int reg, unsigned int value);
@@ -252,6 +253,9 @@
   inline int ReadW(int32_t addr, Instr* instr);
   inline void WriteW(int32_t addr, int value, Instr* instr);
 
+  int32_t* ReadDW(int32_t addr);
+  void WriteDW(int32_t addr, int32_t value1, int32_t value2);
+
   // Executing is handled based on the instruction type.
   void DecodeType01(Instr* instr);  // both type 0 and type 1 rolled into one
   void DecodeType2(Instr* instr);