[Interpreter] Use FastNewSloppyArguments when possible.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d4590e25fecc35ea1b995fd334cc03a76f02d5fe..8ef0137f37932366d664ab88b2e4f912d5248fa4 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7274,6 +7274,8 @@ class SharedFunctionInfo: public HeapObject {
   static const int kStrictModeBit =
       kStrictModeFunction + kCompilerHintsSmiTagSize;
   static const int kNativeBit = kNative + kCompilerHintsSmiTagSize;
+  static const int kHasDuplicateParametersBit =
+      kHasDuplicateParameters + kCompilerHintsSmiTagSize;
 
   static const int kClassConstructorBits =
       FunctionKind::kClassConstructor
@@ -7284,6 +7286,8 @@ class SharedFunctionInfo: public HeapObject {
   // Allows to use byte-width instructions.
   static const int kStrictModeBitWithinByte = kStrictModeBit % kBitsPerByte;
   static const int kNativeBitWithinByte = kNativeBit % kBitsPerByte;
+  static const int kHasDuplicateParametersBitWithinByte =
+      kHasDuplicateParametersBit % kBitsPerByte;
 
   static const int kClassConstructorBitsWithinByte =
       FunctionKind::kClassConstructor << kCompilerHintsSmiTagSize;
@@ -7303,6 +7307,8 @@ class SharedFunctionInfo: public HeapObject {
   static const int kStrictModeByteOffset = BYTE_OFFSET(kStrictModeFunction);
   static const int kNativeByteOffset = BYTE_OFFSET(kNative);
   static const int kFunctionKindByteOffset = BYTE_OFFSET(kFunctionKind);
+  static const int kHasDuplicateParametersByteOffset =
+      BYTE_OFFSET(kHasDuplicateParameters);
 #undef BYTE_OFFSET
 
  private: