Unify kMaxArguments with number of bits used to encode it.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 89ebf210e552645ac1732540985439d28516f092..142334678e2c8c385c28b5174c565f631fecace2 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4302,8 +4302,8 @@ class Code: public HeapObject {
   // FLAGS_MIN_VALUE and FLAGS_MAX_VALUE are specified to ensure that
   // enumeration type has correct value range (see Issue 830 for more details).
   enum Flags {
-    FLAGS_MIN_VALUE = kMinInt,
-    FLAGS_MAX_VALUE = kMaxInt
+    FLAGS_MIN_VALUE = 0,
+    FLAGS_MAX_VALUE = kMaxUInt32
   };
 
 #define CODE_KIND_LIST(V) \
@@ -4784,6 +4784,9 @@ class Code: public HeapObject {
   // Signed field cannot be encoded using the BitField class.
   static const int kArgumentsCountShift = 17;
   static const int kArgumentsCountMask = ~((1 << kArgumentsCountShift) - 1);
+  static const int kArgumentsBits =
+      PlatformSmiTagging::kSmiValueSize - Code::kArgumentsCountShift + 1;
+  static const int kMaxArguments = (1 << kArgumentsBits) - 1;
 
   // This constant should be encodable in an ARM instruction.
   static const int kFlagsNotUsedInLookup =