Update V8 to r5136 as required by WebKit r64264

Change-Id: I55b86fa101d9d53e889e2e3811fdf75f463ac3c6
diff --git a/src/x64/codegen-x64.h b/src/x64/codegen-x64.h
index dc6f583..f694dde 100644
--- a/src/x64/codegen-x64.h
+++ b/src/x64/codegen-x64.h
@@ -454,14 +454,26 @@
   // value in place.
   void StoreToSlot(Slot* slot, InitState init_state);
 
+  // Support for compiling assignment expressions.
+  void EmitSlotAssignment(Assignment* node);
+  void EmitNamedPropertyAssignment(Assignment* node);
+  void EmitKeyedPropertyAssignment(Assignment* node);
+
   // Receiver is passed on the frame and not consumed.
   Result EmitNamedLoad(Handle<String> name, bool is_contextual);
 
+  // If the store is contextual, value is passed on the frame and consumed.
+  // Otherwise, receiver and value are passed on the frame and consumed.
+  Result EmitNamedStore(Handle<String> name, bool is_contextual);
+
   // Load a property of an object, returning it in a Result.
   // The object and the property name are passed on the stack, and
   // not changed.
   Result EmitKeyedLoad();
 
+  // Receiver, key, and value are passed on the frame and consumed.
+  Result EmitKeyedStore(StaticType* key_type);
+
   // Special code for typeof expressions: Unfortunately, we must
   // be careful when loading the expression in 'typeof'
   // expressions. We are not allowed to throw reference errors for
@@ -480,6 +492,13 @@
   void GenericBinaryOperation(BinaryOperation* expr,
                               OverwriteMode overwrite_mode);
 
+  // Emits code sequence that jumps to a JumpTarget if the inputs
+  // are both smis.  Cannot be in MacroAssembler because it takes
+  // advantage of TypeInfo to skip unneeded checks.
+  void JumpIfBothSmiUsingTypeInfo(Result* left,
+                                  Result* right,
+                                  JumpTarget* both_smi);
+
   // Emits code sequence that jumps to deferred code if the input
   // is not a smi.  Cannot be in MacroAssembler because it takes
   // advantage of TypeInfo to skip unneeded checks.