Remove strong mode support from binary operations.

src/ic/ic-state.h

Index: src/ic/ic-state.h
diff --git a/src/ic/ic-state.h b/src/ic/ic-state.h
index f4ed8ac79ca85a01bd2cbc0ca86163851fbb3bf1..d676e70bf3783cdfe4fc2cd8a3a1b23316e55ca9 100644
--- a/src/ic/ic-state.h
+++ b/src/ic/ic-state.h
@@ -60,9 +60,8 @@ std::ostream& operator<<(std::ostream& os, const CallICState& s);
 class BinaryOpICState final BASE_EMBEDDED {
  public:
   BinaryOpICState(Isolate* isolate, ExtraICState extra_ic_state);
-  BinaryOpICState(Isolate* isolate, Token::Value op, Strength strength)
+  BinaryOpICState(Isolate* isolate, Token::Value op)
       : op_(op),
-        strong_(is_strong(strength)),
         left_kind_(NONE),
         right_kind_(NONE),
         result_kind_(NONE),
@@ -109,10 +108,6 @@ class BinaryOpICState final BASE_EMBEDDED {
     return Max(left_kind_, right_kind_) == GENERIC;
   }
 
-  Strength strength() const {
-    return strong_ ? Strength::STRONG : Strength::WEAK;
-  }
-
   // Returns true if the IC should enable the inline smi code (i.e. if either
   // parameter may be a smi).
   bool UseInlinedSmiCode() const {
@@ -151,7 +146,7 @@ class BinaryOpICState final BASE_EMBEDDED {
   class OpField : public BitField<int, 0, 4> {};
   class ResultKindField : public BitField<Kind, 4, 3> {};
   class LeftKindField : public BitField<Kind, 7, 3> {};
-  class StrengthField : public BitField<bool, 10, 1> {};
+  // Bit 10 is unused, feel free to use at own discretion.
   // When fixed right arg is set, we don't need to store the right kind.
   // Thus the two fields can overlap.
   class HasFixedRightArgField : public BitField<bool, 11, 1> {};
@@ -159,7 +154,6 @@ class BinaryOpICState final BASE_EMBEDDED {
   class RightKindField : public BitField<Kind, 12, 3> {};
 
   Token::Value op_;
-  bool strong_;
   Kind left_kind_;
   Kind right_kind_;
   Kind result_kind_;