Make KeyedStores from a sloppy arguments array use a handler.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 9b81cf68d70630d0d92cd0df22262e9b25f46f47..eca7c76c22365bc03fb6829791cf3e4fdb75dac3 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -101,6 +101,7 @@ namespace internal {
   V(LoadFastElement)                        \
   V(LoadField)                              \
   V(KeyedLoadSloppyArguments)               \
+  V(KeyedStoreSloppyArguments)              \
   V(StoreField)                             \
   V(StoreGlobal)                            \
   V(StoreTransition)                        \
@@ -1137,6 +1138,20 @@ class KeyedLoadSloppyArgumentsStub : public HandlerStub {
 };
 
 
+class KeyedStoreSloppyArgumentsStub : public HandlerStub {
+ public:
+  explicit KeyedStoreSloppyArgumentsStub(Isolate* isolate)
+      : HandlerStub(isolate) {}
+
+ protected:
+  Code::Kind kind() const override { return Code::KEYED_STORE_IC; }
+  Code::StubType GetStubType() const override { return Code::FAST; }
+
+ private:
+  DEFINE_HANDLER_CODE_STUB(KeyedStoreSloppyArguments, HandlerStub);
+};
+
+
 class LoadConstantStub : public HandlerStub {
  public:
   LoadConstantStub(Isolate* isolate, int constant_index)