[KeyedLoadIC] Support Smi "handlers" for simple field loads

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 87d69f37a2395c7007bda765e39adad91e4a2b63..83096044cc6a2a7161e3203efe34a53a66f8c841 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -449,6 +449,9 @@ class CodeStubAssembler : public compiler::CodeAssembler {
                              Variable* var_handler, Label* if_miss,
                              int unroll_count);
 
+  void HandleLoadICHandlerCase(const LoadICParameters* p,
+                               compiler::Node* handler, Label* miss);
+
   compiler::Node* StubCachePrimaryOffset(compiler::Node* name,
                                          compiler::Node* map);
 
@@ -471,6 +474,7 @@ class CodeStubAssembler : public compiler::CodeAssembler {
 
   void LoadIC(const LoadICParameters* p);
   void LoadGlobalIC(const LoadICParameters* p);
+  void KeyedLoadIC(const LoadICParameters* p);
 
   // Get the enumerable length from |map| and return the result as a Smi.
   compiler::Node* EnumLength(compiler::Node* map);