[strong] Disallow implicit conversions for binary arithmetic operations

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 8617d385347a889430f0a86492cc3250da6f7a35..a07ed2274c34c167531e78b89c829e15e3e24cba 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1436,7 +1436,8 @@ class HGraphBuilder {
                                Type* right_type,
                                Type* result_type,
                                Maybe<int> fixed_right_arg,
-                               HAllocationMode allocation_mode);
+                               HAllocationMode allocation_mode,
+                               LanguageMode language_mode = SLOPPY);
 
   HLoadNamedField* AddLoadFixedArrayLength(HValue *object,
                                            HValue *dependency = NULL);